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I have just repLACED THE COIL AND MODULE PACK WITH A KNOWN good used one the vehicle now runs but the check engine light is now on. I have a code reader and it says that the crank sensor is the problem. If it was the problem than i dont think the engine would start. Could the coil & module pack be it.

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Dont trust a code reader on this car it will not work correctly ,and not at all on a europeon market vehicle ,you havent stated what model vehicle but a some of these vehicle will throw the engine light if the vacumn pipe is left off or its deteriorated ,combined module /coil unit is a right piece of you know what they always overheat and crack up causing no go or misfiring ,if the crank sensor was defective it wouldnt run full stop

Posted on Dec 29, 2010


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Coil packs I replaced #4 and #5 went out. Why?

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When the spark travels to the spark plug, it jumps from the spark plug gap to the ground, causing an explosion of the fuel air mixture inside the cylinder chamber Coil Pack Problems Usually, if a coil pack is bad, there will be a loss of fire or spark in one or more cylinders. This causes what's commonly referred to as misfiring. Misfiring can cause drag on the crankshaft, and usually results in a very poor performing engine Common Symptoms of a Faulty Coil Pack A faulty coil pack will generally have symptoms similar to a faulty spark plug. Some of the most common tell tale signs that a coil may be defective include:
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    Beck Arnley is a well known name in the automotive ignition parts industry. They are favored by many mechanics, especially those that work mostly on import cars. The Beck Arnley 178-8025 rotary engine coil pack is a direct replacement for original equipment parts on older Mazda cars with a rotary engine. You can expect to pay about $55 for one.Performance Replacement
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Sep 30, 2016 | Cars & Trucks

1 Answer

2003 buick lesaber new coil pack . still no spark what do I trouble shoot next??????

Did you really replace all 3 coils?
Did you have the check engine light on? You should have the code scanned if it was on to tell you what was at fault.

If you didn't have a check engine light indicate that you had a problem, it seems this problem could have been diagnosed without paying for an unnecessary part by going to a certified shop and having an electronic diagnosis.

Other than a coil pack, the vehicle needs a computer to control the spark. That's what the ignition control module (ICM) is.

You did replace all the wires you disconnected, didn't you?

Feb 12, 2015 | 2003 Buick LeSabre

1 Answer

Why wont my 2002 olds alero start when its cold out

One of the coil packs or the ignition module is probably bad. Test for spark when cold. If no spark on any coils suspect the ignition module or crank position sensor. If spark is gone on only one coil check the plugs and wires to that coil pack. If theplugs and wires are ok then replace thge coil pack. Don't forget the obvious load test the battery and clean the battery connections. If the check engine light is on run any diagnostic codes and repair

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1 Answer

2007 Vibe.. Engine light comes on, vehicle starts to stall, then continues to run but runs rough. Code shows ignition coil faulty but have replaced, checked plugs,etc. but error continues same problem,...

you change the coil but not the module or it is a coil pack assembly
module is the primary circuit and coil is secondary circuit you need the both to fire at cylinder

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1 Answer

2000 ford explorer Have a p0305 code started a while back when accelerating to pass a car the truck would **** and the check engine light would blink but once i take foot of the gas it would go back to...

A PO305 code is for a Cylinder #5 misfire code. This would definitely cause a lack of power when passing and would cause the check engine light to blink when you are into the throttle and then stop once you let off the throttle. This could be caused by a faulty coil pack or a bad spark plug for that cylinder. I dont know which engine you have in this vehicle, but if each spark plug has its own coil, you can try unplugging the coil pack for cylinder # 5 while the vehicle is running and if it changes the way it runs then the coil pack is probably good, but if there is no change when you unplug the electrical connector, there is a good chance the coil pack is bad. It is not unusual for these coil packs to burn out.

Hope this helps... if there is anything further i can help you with, please feel free to ask.

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1 Answer

Malfunction indicator light

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2 Answers



When a faulty coil gets hot, it quits working, you have a 3 pack and they hardly ever go out in packs, usually one at the time and it will be misfiring and loss of power before the engine dies and the check engine light will come on. If check engine light is on, have the codes scanned to find out which coil is defective.

Otherwise, I would go for the ignition module, it is the flat part in wich the coils sit on. Check connector and wiring.

Check for spark in all 3 colis when no start condition occurrs, if no spark in nither one, replace ignition module.

Don't forget to rate this post!! Good Luck!!

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1 Answer

How do i determine whether the problem im having is from the ignition coil being defective, secondary ignition plugs, wires, cap, rotor, poor electrical connection, circuit fault, driver circuit...

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1 Answer

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