Question about Volkswagen Jetta

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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?


How to Tell if You Have a Faulty Coil Pac How a Coil Pack Works When creating a spark at the spark plug, the fire must initiate from a high voltage supply, so as much fuel as possible burns in the cylinder. Whenever the combustion process is started, the coil pack builds up the energy, as much as 50,000 to 75,000 Volts. When the electronic control module (the car computer) sends the signal to the ignition control, the voltage is released from the coil pack through the spark plug cables to the spark plug.
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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  • Smoke from the exhaust emitting intermittently, instead of in a steady strea How to Test a Coil Pack Fortunately, there is an easy way to test the coil packs in your vehicle and make sure they're working as they should. You need to use ohm meter to test the coil pack for continuity. Make sure you have the approximate ohm values for the coil pack. To find this information, research your car's engine on the Internet or purchase a Chilton's or Haynes manual to find out what the mega ohms reading on the coil pack should be. What Coil Pack Works with a Rotary Engine? Most rotary engines require a different type of ignition coil pack. Below are two, one for a standard replacement, and one that is a higher voltage performance type coil pack.
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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
    M&W Ignition Systems is a fairly well known name in the import performance market. Their part number PAK005 is a high performance ignition coil pack for the performance enthusiast who isn't afraid to spend a little more on a high quality high performance part. With prices running around $245 for a double coil pack for direct fire ignitions, these coil packs will deliver years of excellent performance.
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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


if you receive a code indicating ignitial coil c secondary circuit this means a plug wire that connects your ignition coil pack module to a spark plug in the motor has come loose OR has become worn out
(not likely on '05 odel) or one of the coil pack modules has gone bad. If you recently had muffler repair work done, then suspect a wire has come loose and attempt to remove and reconnect each wire to the coil pack. If not, I would recommend replacing the coil pack module that's easiest to get to and testing the vehicle after replacing it. If that doesn't do it you will have to keep replacing until it starts running properly or you will need a shop manual to indicate which one is "COIL C". It's not very likely that a wire will be worn out based on the age of your vehicle, but heat from a motor will destroy a coil pack over a matter of several years especially if the coil pack is near an exhaust pipe or exhaust manifold.

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2 Answers

WILL THE IGNITION COIL STRIP OR PACK CAUSE A 2003 GRAND CHEROKEE 4.0 NOT TO START AFTER THE ENGINE GET WARM.I CAN GO TO THE VEHICLE AND START IT ABOUT TWO HOURS LATER. I WILL LEAVE IT RUNNING ABOUT TEN...


Hi!!

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

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4 Answers

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1 Answer

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