So the other day, I turned my car on five minutes after turning it off and the car started shaking violently. I took it to get scanned and the code said cylinder 2 misfire. I changed the spark plugs and that did not help. I moved the coil pack from cylinder 2 to cylinder one. It is still misfiring so I will take it tomorrow to get scanned again and see if the misfire followed the coil pack. the people at autozone said that the car was rumbling way to much for it to be just a misfire. Should the misfire not follow the cp, what else could it be?

 

do not trust the idiots at autozone. if the misfire moved, its the coil pack. if it stayed in cyl.2 its the ICM (if you have an ICM, you didnt say what year your car is).

 

yeah, the misfire probably happened on the cylinder you switched coils on and u most likely need that coil replaced.

 

i had them rescan it 2 hours later and it stayed in cylinder 2. I have a 98 1.8t

 

its your ignition control module. located on your airbox, it occasionally burns out, most often when it does cyl.2 is the one that goes.

 

thats the bosch sensor on the top held down by two screws correct?

I am looking on ecs, and they have multiple ones, will the cheaper Huco brand one fit my car? All I need is for it to run smoothly before I take it to trade in

Thanks for the quick replies

Edit:

Oh and is there a way to test wether or not the ICM is fully functional?

 

the fact that your misfire is not due to the coil pack (it would follow the pack to another cyl when you moved it) or plugs tells you its the ICM. the only better way then that to test it, is to change it with a new one.

if ecs' site says Huco will fit your car, then it probably will. you can also look around in the classified section for people parting out their car.


yes, it has a little metal heatsink-like thing on the underside.

 

Could be an injector, if you want a no cost check for that swap the cylinder 2 injector with another injector. I have 6 cylinders and when my injector stuck open it ran REALLY bad so yes it is just a misfire.

 

i have the same problem, got the ecu back to the house scanned it it said cylinder 3 is misfiring swapped the coil packs and retested it still says its coil 3 misfire.... gonna go buy a new icm...... if its not the icm what else should i look for before i really have to bring it to the shop??????

 

99% of the time, it will be because of either: a bad spark plug, a bad coil pack, or a bad ICM. the other 1% of the time it could be a stuck fuel injector (very rare) or a bad valve seal/guide (also rare unless you had a foreign object get sucked in or a timing belt issue), or bad head gasket or low compression.