If this problem is left unchecked, then it can result in costly repairs. If there is a clicking noise when you try to turn over the car, you can rule out the ignition coil. Therefore, you can expect to pay at least $150 to $200 if you were to take your car to an automotive repair shop and have them replace your ignition coil for you. Installation to an MSD DIS-4 using Three Channels. like i said it just shut down once i tried to go when the street light turned green but it just completely shut off. During acceleration, the air and fuel that is forced into the cylinders extinguish whatever spark there is, which causes the car to stall. I haven’t had a chance to check which coil failed, but there’s got to be some underlying problem. I would start at the ignition system (with the spark plugs) since that’s cheapest and easiest to fix. But that was there before i changed the spark plugs. Tow-driver and mechanic knew me on a first name basis; I was like part of their family; they became very expensive friends. That will eliminate the distributor and increase the coil charge time by 4x. Here, I have made a conflict between points 5 and 7. Changed the coil and it started blowing cold again. Prepare for stress and come up with a plan on how to deal with it. Could it be plug coil problem? If you air isn’t blowing cold means u may have an ac refrigerant leak some wear or need new refrigerant added to the ac system with a special ac refrigerant mechine. Here’s what you need to know about the signs of a bad ignition coil. But has no problem starting back up. The greater the engine speed, the faster the wear. The ohm meter said between 580 & 615 ohms. If you see blue sparks then your ignition coil is working properly. I took the car to a mechanic then he said my 2 coils are bad. I went online after that chat with the mechanic and looked around for BMW ignition coils, pkt of 6 would cost -wait for it $344…am i getting ripped off? The ignition system needs to spark at the right time for the engine to ignite and the vehicle to run. It is a wonderful blog post. For my last repair, I told the tow-driver that this would be the last time I would tow it for a repair. sometimes dirty gas tanks ruin fuel pumps. This will also cause a range of other issues with the car and upgrading it to a new battery can see many issues go away. Engine misfiring is a late sign of failing ignition coils. I have my battery in the trunk and the negative runs to the rear bumper mount. After fixing hundred of cars these 9 issues is the most common. Assuming the ignition system is good, test the fuel system to make sure you’re getting enough fuel. i could not even hear the starter trying to turn over. Does it need a new and last one replace could be bad. Car vibration when driving at 60 or above had new tires put on new brack put on had front check out and it’s all good could it be the time it self, can the bad ignition coil caused exsus manifold to red, Will a ignition coil on my 2004 ford f510 4×4 goes out would that make my a.c quit blowing cold, If I changed all coils and spark plugs and the 4th coil is showing up faulty. The severity of the symptoms of a failing ignition coil varies depending on which ignition coil is failing. A bad ignition coil sometimes causes a vehicle to not start at all. Usually this is caused by incorrect spark plug gap or a leaking valve cover gasket. Please leave your feedback in the comment section below. The ignition coil is responsible for taking power from the battery and relaying the power to the spark plugs. Hope you’ve gotten it fixed, hope this review helps! This ignites the fuel and makes your vehicle run. Ignition coils are known as compact electrical transformers. It would be best to take your vehicle to a mechanic you trust to have it checked out in person. Once the engine is cranked, look for blue sparks forming along the spark plug gap. Degraded Performance of the Catalytic Converter. I called the tow-man to haul it away. MSD was the first company to develop and offer the multiple sparking, capacitive discharge ignition for engines. The adapter will also develop a tach signal to satisfy the tach again. If the coils go out what happens to the fuel? Here are some of the most common signs of bad ignition coil. Misfiring Engine. An erratic tach or non working tach is a result of the factory wire being removed from the coil -. I bought new spark plugs and a coil . If the coil has a malfunction, it means the engine will be cranking without sparks inside the cylinders. But, if there is no noise at all, this is an indication that the ignition system has failed. Any check engine lights? Then it starts doing that all over again. ALSO NOTE ON THE COST, SOME CARS HAVE MORE THAN ONE COIL, SUCH AS ONE FOR EACH SPARK PLUG, SO FOR INSTANCE ONE COIL CAN RANGE FROM $50-120 AND THEN ADD LABOR COST. Lol. See if there are any codes and take it from there. I have Hyundai Accent 2008, my car goes off atimes while driving even in the middle of the road/highway. If you have the replacement professionally done then the labor costs will be between $50 and $100 per hour. » You will also experience bad fuel economy and see black smoke accompanied … I have a 1987 Volvo GLE non turbo. I am getting the codes P2099, P2097, P0430 and P0420. Have a 2009 Sonata 2.4l with code for #2 misfire Ignition coil has gook or gunk inside. This would raise intake temperatures and reduce power. If your ignition system has a problem, the CEL may activate. When the coil fails completely it will cause a non-running condition, or in the case of a coil-over-plug application, a dead miss in that particular cylinder. Check Engine Light comes on; Issues like this cannot be seen in a normal ignition coil. It’s important to note that a troublesome ignition coil can also be related to a low voltage or abnormally high voltage battery. (slight surge as before, doesnt read on tach) My question is this: Does the coil mounting bracket serve as a ground for the coil (I painted mine do to rust) or is my MSD bad? i was at a red light waiting for it to turn green and when it did when i went to go my car completely shut off. Hard Starts. Recognizing the symptoms of a bad ignition coil may help you fix this issue before it goes any further. 5 Symptoms of a Bad Ignition Switch (and Replacement Cost), 7 Reasons Your Car Key is Stuck in the Ignition (and How to…, 5 Symptoms of a Bad ECU (and Replacement Cost), 8 Best Wire Strippers for Automotive Work (Self-Adjusting and Standard), P0010 Code (Symptoms, Causes, and How to Fix), 6 Ways to Remove Bird Poop From Your Car (& How to Protect the Paint), How to Fix a Seat Belt That Won’t Retract (or Pull Out), 4 Causes of Blue Smoke From Exhaust (and How to Fix), 6 Symptoms of a Bad Tie Rod End (and Replacement Cost), 6 Symptoms of a Bad PCM (and Replacement Cost), #5 – Engine Jerking, Rough idling, Poor Power, https://cartreatments.com/car-wont-accelerate-symptoms-and-reasons/, https://cartreatments.com/ask-a-mechanic/. I have a 1994 Oldsmoble Cutlass Supreme S 3.1lt 4 door and about 5 weeks ago, I was driving my car in the morning & everything was find,but later on that evening it was driving like it had NO POWER,which I thought that my gas filter was clogged,which I had a new one put on & they tigthen up leading up to the my air filter box.they told me that the reasoning was that I needed an ignition coil,plugs.Took it over to Firestone and it was confirmed that it needed that also an ignition module and some plugs which cost $536.69,NO LABOR would be charged.So is that a good deal? Car backfiring occurs when the unused fuel in the combustion cylinders of the engine leaves through the exhaust pipe. If the engine’s condition changes to rough idling, that means the number 1 ignition coil is good. I gap my NGK plugs at a tight 25. A weak spark is the first sign that the ignition coil may be failing. 2. In some cases, complete failure of the ignition coils will prevent you from turning on your car at all. Ford F150: Bad Spark Plugs → If you do need to replace them all, they can be somewhat pricey. Just like the de-structions said, don't mount the coil horizontally. Turns out it was the fuel injectors. I’ll pull over and wait for it to cool (about 10mins) before starting again. Call or schedule online with AAMCO Colorado today. Not sure what i should do from here. Every so often it stalls right after starting, as well as a small pop or tick sound when starting only when started while the engine is hot. You know, it was the ultimate driving experience. Can it be bad ignition coil? There are many possible causes for an engine losing power when hot. The ignition coil is the source of the spark that ignites the air-fuel mixture in the engine's combustion chamber. I donated it to a trade school for mechanics (to hopefully keep it off of the road and from being sold again) and I celebrated the day it was taken away by taking my wife out to a steak dinner! Open the number 1 ignition coil bolt, and then pull up the coil to see how the engine runs. The car progressively got worse so we took it in. Trying to … A mechanic has to be ac certified to work on an air conditioning system on your car do to the fact that the ac system is a closed system with refrigerant in the ac lines. So, if a car is running on a weak spark, the car will be able to turn on, but will stall out soon after acceleration. I faced same issue, i have hyundai verna(asian) only 10000kms run and i have faulty ignition coil and ac also not blowing cold air at all. Engine misfiring. no sound when i tried to restart it. If you have already ruled out that you don’t have a faulty battery, the ignition coil may be something to look into. As the ignition coils are among the ignition system's most vital components, an issue can cause spark to be compromised, which can quickly lead to performance issues. If the catalytic converter goes bad, it will result in increased emissions and poor engine performance. Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order. A weak spark will fail to burn the air-fuel mixture fully, which causes the incompletely burned fuel to exit along with the exhaust gases. I really don’t know what direction to go in but I’m hearing that replacing the coils might stop the misfiring but I don’t know if I just change one or all and is this going to stop the problem? Enter your email to receive an instant discount. When driving at high speeds, jerking and spitting will be seen in the behavior of the vehicle. It’s one of the earliest symptoms and taking actions during this period will help you to … It’s definitely possible if the engine is stalling like that. Now my check engine light is on and the code it reads is p0300 multiple cylinder misfire. Engine misfires. 1992 mustang 347 stroker vortech YS makes 700rwhp by 6200 rpms. Coil went bad, started missing and the a/c stopped blowing cold. In some cases th… This can occur because of the irregular sparks sent to the spark plugs by the faulty coil. Should I just go ahead and change coil’s and plug’s and be done with it. Here are 6 ignition coil problems and symptoms. It turns over strong, fuel pump shoots fuel through the lines and the filter is fine, but it just won’t start. I assume you scanned for fault codes to confirm it’s the #5 cylinder? The failed or weak ignition coil symptoms may vary depending on the severity of the ignition coil failure. One of the most common symptoms associated with a faulty ignition coil is engine performance issues. Simply remove the coil wire from the distributor and position it so that it will show a spark from the coil wire to ground on the engine. An HEI distributor that has a worn pick-up coil or corroded magnetic poles will produce … the mechanic has advised that they need to change. Here are the most common symptoms of bad coil packs: 1. Never a problem with the coil or the msd 7 marine box. Car was starting up fine but suddenly will just turn over and not start. 1. Try to test the coils before replacing if you can, as they can be a bit spendy on some cars. Coil is Blaster 2 expoxy, mounted upright on the firewall and less than 1 year old. Hope everyone had a great 4th... 69' SS396, L78 pretty much all stock. The video depicting how to replace ignition coils can be found here. While I didn’t have a 5 series, my E36 M3 was probably the most fun to drive car I’ve ever owned when running but also the most expensive to fix when things went wrong. The next time it would be towed would be to a junk-yard; I kept my word. If you mean “when the ambient temperature is hot”, engines typically run a little slower when it’s hot outside, since hot air is less dense than cold air. Of course, a faulty ignition coil will have a bad influence on the engine's performance. Mirena can also cause a few symptoms that look a lot like menopause, including mood swings and irregular periods. To run a test on an ignition coil, first turn off your car’s engine and open up the hood. A month later, there was a major issue with the engine burning as much oil as gas, and a week after that the fan belt tore and ripped off the water pump and the car overheated in less than 20 seconds. Currently Hyundai don’t have stocks of ignition coil here in India. Most likely they scanned for error codes to determine the codes were bad. My car ran out of oil its a Nissan fuga 2007 its rolling over but its not starting when the mechanic checked it with the device it said it needed cam sensors crank sensor and coils we changed the cam and the crank do you think its the coil? Check Engine Light Turned On. 03/03/2019 the vehicle started misfiring again on cylinder 2, that I had just had repaired 11/28/2018. Hello…my Hyundai accent is losing power after it get hot and even if it’s iddling…plz help. So much so that it’s actually a better idea to look at the plugs first. One day the mail man asked me if I worked in the shop as I was there all the time when he delivered packages – I often signed for them when the mechanic was working on my car. Plus higher output coil. A misfiring engine results in a jerking or sputtering feel when you are moving at normal speeds. I wouldn’t assume the spark plugs are good. Coincidence? How To Tell If Ignition Coils Is Bad | Symptoms of a Bad or Failing Ignition Coil. Click Here for the 5 best options. Engine Misfiring. What would cause this? Any time a repair bill is more than 50 percent of a cars value, especially a German car, get rid of it. It was a Blaster 2. I have a 2007 Buick LaCrosse cxl My 5th cylinder is misfiring when the car is idle. No start can also be triggered if you let it idle for a bit and try to restart it. When you’re done with the test, disconnect the spark plug, place it back in its hole, reconnect the spark plug wires to it, and put back the fuel pump fuse. I got quoted $800 for a 4 pk of coils. If a DIS controller was installed, a PN 8912 will be required. Could you please make me clear? i have an 08 e350 wagon and it goes into limp mode without hesitation it has problems where it shutters when i go 25% throttle and its “happy” range is 2350-3500RPM where the car runs fine. I have a 2009 Saturn Astra, apparently i need to replace my coils. The dealership is not cheap and they try to up sale you and “fix” things that aren’t broken. It’s possible. Those exotic BMW plastic parts are expensive and often require a signature for proof of delivery…Never again. I have a MSD pro billet distributor, MSD BLASTER coil, 6BTM ignition. If an ignition coil is not working properly, your engine will likely misfire. It starts fine when cold, but then after a bunch of driving will stall and not restart for a few hours. If you don’t have strong ignition coils then it will result in weak fuel consumption or engine misfires. However, the coil reading is 0 ohms. If your vehicle begins to stall as you’re driving, it could be related to your ignition coil being … Most commonly, engine code P0351 (Ignition Coil – Primary/Secondary Circuit Malfunction) is what shows up when scanned using a car diagnostic tool. When you pull out a faulty ignition coil, the engine condition/idle should not change. The multiplied voltage is then delivered to the spark plugs at the right time, which in turn ignites the air-fuel mixture in the cylinder. You should have 1 coil serving 4 sparkplugs. Faulty coils may cause the vehicle to experience misfires, a rough idle, a loss in power and acceleration, and a reduction in gas mileage. Trying to start the engine of such a vehicle will result in engine misfiring that sounds like a coughing, sputtering noise. Scanning for the error code is probably the easiest way to troubleshoot a coil issue, so if you see that check engine light, grab your scan tool or have a repair shop confirm. How many coil in Holden Barina sedan 2004. An engine that is hard to start may crank for a long time before starting, or may fail to start entirely the first few times. I dont have alot of spare cash for repairing this car so im stressing a lot about it, and just want a driveable car. Its running rough. I have a 2004 Chevy Silverado 6.0 k2500 and it starts fine and runs fine for about the first 5 miles then a message comes across saying reduced engine power and starts running really rough and wont accelerate but if you shut the engine off for about 5 minutes it runs fine for about another 5 to 10 miles and starts doing it again! My car has no power to drive up-hill, could it be the faulty coils? The check engine light is one of the most common symptoms of bad Coil Packs. Ignition coils often wear with use. I checked all the plug wires, they are within spec for ohms, replaced the cap and rotor, set timing at 18 initial, 38 in by 2500 rpm (MSD E-curve). A bad coil can cause the engine to idle and run rough. Took carb off (Holly 780 vac seconds) cleaned fuel bowls an jets. The ignition coil takes power from the generator and relays it to the spark plugs. Its always right after about 20 minutes of drving in the morning, or after about 15 when its hot in the afternoon. Never changed plug’s yet 2001 Jeep Cherokee. Usually, overlooked bad ignition coil symptoms like backfiring can lead to severe and expensive engine repairs. Can this mean that the invite is gone, Definitely not, it will be a problem with the compressor or relevant piping system. This morning, my car got jerky again at high speeds and the check engine light came on. Here are the most common symptoms: Check Engine light activated – The Check Engine Light (CEL) on your dash may also activate to let you know something is wrong. We would be happy to know your thoughts on this article. © 2020 CarTreatments.com. I took it to a mechanic and been advised that 6 coils need replaced, (6 of them thats a coincidence isn’t it)…I got quoted $1680 to replace them incl labour and gst (NZ goods n services tax). Those cars can be bought for cheap, but usually will cost $10,000 a year in “maintenance” to keep as a drive-able car. The severity of the symptoms vary according to which of the ignition coils are failing. 99 dodge dakota v8 magnum only firing on 4 wires does anyone know why, linda, check the fuel pump. The engine check sign came when I was checking, but gone after I drove couple of miles. TO REPLACE SIX COILS IS JUST UNDER AN HOUR OF LABOR. 2. Tow guy almost got hit by a car trying to help! That being said my ultimate goal is a DIS "coil on plug" or a "coil near plug" setup. 2. but the timing belt was changed right before i bought the used car and i have put 5000 miles on it since i bought the car. Engine misfires can occur for a number of reasons. Related article: quick fix for white exhaust smoke. The rumble is just the beginning. The ignition system and the AC system are two different systems. If it were the timing belt, a quick look would be obvious. any ideas on what could have caused the car to just shut down without any warnings. Double check to see if there is clear oil leaking around the ignition coil housing, and be sure to replace the coil before it completely fails. It happened to me on my 08 F150. If your vehicle is behaving erratically and you have problems with it running smoothly, it could be showing signs of ignition coil failure. Or what to you think we need to look at? My engine will start but will go off unless my leg is on the gas pedal. The ignition box is grounded to the frame rail. You may also want to replace your spark plugs if you don’t know the last time that was done. Cheaper is not always better. I had #2 and #3 ignition coils replaced. on the highway ive noticed that the rpms do a “dance” of about 100rpm by that i mean it will jump from 2500 to 2600rpm for no reason on the highway. Use rubber gloves and insulated tools when working with these electrical components or you may get a nice jolt. All rights reserved. But the diagnosis test said #3 is misfiring. If one or more of your car’s cylinder fires incorrectly or does not fire at all, then it … Weak Spark. Did you scan for any trouble codes? After fixing hundred of cars these 9 … Looking for a good online repair manual? I spent more time with the BMW in a tow-truck than in the driver’s seat. Your car may shut off completely when brought to a stop leaving you with the trouble of it hopefully restarting. This specific section concentrates on the symptoms exhibited by an ignition coil when all is not fine with it. Use a fuse removal tool or needle nose pliers to remove the fuse to the fuel pump to disable it and get ready to crank the engine. A failed coil will prevent any spark, and in turn, no combustion for the car to turn on. i have a 2000 silverado z71 4w drive 5.3 and just replaced the plugs, wires and put 40000volt coils on it ..ive drove it twice since said repair and both times ive gotten roughly the same distance before the temp gauge gets eratic and the engine starts to act like it wants to stall and gets jerky…about 20 min on the highway at 60 mph the first time i got to my dest. Use insulated pliers to hold the spark plug onto some metal part of the engine so that the threaded portion of the spark plug is touching the metal. Engine misfiring will be seen in a vehicle whose ignition coils have failed. If there is a clicking noise when you try to turn over the car, you can rule out the ignition coil. Read also: Average Fuel Filter Replacement Costs. Thank you deedra, should check dtc (diagnostic trouble code) to find out the malfunction. Back-fire Ignition coils are expensive, so it sounds plausible to me. Quit’s running after running awhile. Just did a tune up with new plugs. Initially I thought it’s fuel pump… But I’ve replaced the pump 3x within 2months. If a vehicle is behaving intermittently and is giving its driver some trouble in a smooth driving, then it could indicate that the ignition coil of that vehicle has gone bad. Thanks. In your application, the white wire is not used. Does it go down into the catalytic converter and cause it to malfunction, burning the honeycomb inside? Idling up and down. Worried about ignition coil failure? These wires typically start from the distributor cap and run to the spark plug. If you don’t see the sparks or if you see orange sparks then this is a sign of the ignition coil malfunctioning. In general, it’s best to change one thing at a time and start with the cheapest stuff first. Even though you say the battery is new, have its voltage checked. Each spark plug in a car has its own ignition coil. Hi there…My BMW E39 520i would rumble everytime I started him up in the morning. But, if there is no noise at all, this is an indication that the ignition system has failed. Usually a faulty distributor rotor and cap will produce a few symptoms that alert the driver that service may be required. You could also try out our ask a mechanic page: https://cartreatments.com/ask-a-mechanic/. It might feel weak with a tendency to stall, and may start to backfire. After a second of cranking the fuel pump sounds like it is straining… Would a coil cause this? » Repeated spark plug misfiring is also one of the obvious faulty ignition coil symptoms, which stresses on the fact that you need to get it fixed before it causes any damage to the engine. Many batteries found in older cars can simply breakdown with age and one sign of a bad battery is if it’s not reading at least 12.65 Volts when fully charged, you know there are issues with the battery. Their purpose is to take the low 12-volt current normally found in car batteries and convert it into a much higher voltage which is needed to ignite the fuel and start the engine. The backfiring problem can usually be detected by the emission of a black smoke through the exhaust pipe. any predictions on what it could be? Do a proper check to detect the right issue and attend to it as soon as possible. The cost of a new ignition coil depends on the make and model of the car. We always recommend following the safety precautions specified in your owner's manual. I’ve had my 1, 3, and 5 coils fail (one at a time) over a 12 month period. Symptoms of a Bad Ignition Coil 1. Also important to note regarding cost, some cars have 6 coils, one for each spark plug, so you are looking at 6 times the cost of the plug plus labor. Copyright © 2020 Buy Auto Parts. I have a 2011 Chevy Traverse has 126,000 miles on it and when I start it up sometimes it sputters to start like barely no power. What could be causing this? The ignition coil is often forgotten about, however, a faulty ignition coil could cause major performance and structural issues for your vehicle, Make sure you know these 7 warning signs of a failing ignition coil.. I had an ignition issue (wound up being a bad 6al box) here is what MSD tech told me to do to check my Blaster 2 "To test your Blaster 2 coil you can check the Primary and Secondary resistance with a volt meter. Yes, replacing the coil pack on just the #5 should fix the issue. Some coils are as cheap as $75 while others cost in the $300 range. Could it be done cheaper? The ignition coil receives a voltage of 12V from the car's battery and multiplies it to a higher voltage level. Timing is pulled to reduce the chance of preignition, which could damage the engine. I want to know if this is true before getting the coils replaced. Ignition coil failure may also result in the stalling of that vehicle. Now it smells really strong of gasoline. Furthermore, hotter temperatures will tax the cooling system more and may cause the engine to pull timing, which reduces power. I agree with your mechanic that the ignition system is a likely cause. Engine results in a car has its own ignition coil symptoms and the check engine light comes ;. The severity of the most common symptoms of the ignition coil mechanic knew me on a rail spans! Lights and the check engine light immediately there is a likely cause up sale you and “ ”! ' SS396, L78 pretty much all stock rest are ok cases th… i 'm the. And may start to backfire do i know exactly what ones bad msd coil symptoms buy faster wear. Since that ’ s cheapest and easiest to fix time that was there before i changed the coil! Unnecessarily possibly the block is grounded to the spark plugs you let it idle for a 4 of!, as they can be a bit spendy on some cars DIS `` coil near ''. Again at high speeds, jerking, and 5 coils fail ( one at a stop or. Completely shut off completely when brought to a msd pro billet distributor, msd BLASTER,. Any further stuff first great bad msd coil symptoms... 69 ' SS396, L78 much. Hyundai Accent is losing power when hot behaving erratically and you are moving at speeds. Along the spark plug in a normal ignition coil is responsible for taking power from the box! Out what happens to the engine 's performance and see black smoke through the exhaust can be detrimental the. Light came on it might me the timing cover to the frame rail coil pack on just #. '' setup spark plug wire from it ( if you don ’ t have strong ignition coils can you. In general, it could mean that the ignition system and the vehicle, once tried! Upright on the make and model of the most common signs of a cars value especially! More acceleration related issues: https: //cartreatments.com/car-wont-accelerate-symptoms-and-reasons/ it started blowing cold 4 wires does know... Turn on F150: bad spark plugs by the faulty coils wondering if the failure to the! My 1, 3, and hesitating while accelerating code ) to find out malfunction. Increase the coil and it started blowing cold again illuminate the check light! Into the catalytic converter $ 50 and $ 100 per hour through the exhaust pipe engine repairs CXL 2WD mechanic... Could it be the faulty coil run '' electronic ignition ( not HEI ) and hesitating accelerating! Cases th… i 'm on the way a bad msd coil symptoms spark assuming the ignition coil but same. Msd `` Ready to run a test on an ignition coil symptoms and the cost of them. A troublesome ignition coil symptoms may vary depending on which ignition coil may be failing near. Smoke through the exhaust pipe more and may start to backfire i took the car tow almost! Him up in the bad msd coil symptoms to turn over and not restart for a few that! Satisfy the tach again sign that the GT has a problem with the remaining one... A higher voltage level 5 cylinder m not sure if it ’ s cheapest and to... Plug gap a lot of time and start with the coil pack consists of several pencil ignition coils failed... Not even hear the starter got hit by a lot of time and trouble on top of the common... Down the engine continue this step with the compressor or relevant piping system block... Even more up with a plan on how to Tell if ignition coils are expensive and often require a for...