View Full Version : Misfire cyl#2 with new coil pack and new plugs ... Fml

10-15-2011, 12:33 PM
3 weeks ago got a misfire while doing 100km+ on the highway after a few feet rolling it stopped car ran fine. it happened a 2nd time so i got it scanned and changed the coilpack and all the spark plugs. 3 days later same problem and its happening more often on the same cylinder #2 .. i check the hoses and pcv systems for cracks or leaks but found nothing .. the turbo seems fine , i have to change my cat but other than that what can cause this problem constantly .. i have to go south of the border driving this weekend i can stall in the states cuz we all kno how much towing will cost

10-15-2011, 12:35 PM
only had this car a few months and im new to this i would only ask if i couldnt find an answer online any help is appreciated

10-15-2011, 12:56 PM
What year is your car, if its an earlier model you could have a problem with your ignition control module, located on top of your airbox. This is pretty common for failure.

10-15-2011, 02:22 PM
x2 on the icm.

10-15-2011, 05:40 PM
Otherwise it could be heat affecting his wiring harness if not the icm. That was my problem. Heatshrunk some wrap on it, and its a quick fix until I pick up a new one.

10-15-2011, 06:41 PM
Hmm 2nite it's constant from the start I just had 2 crawl it home well I guess time 2 order me up a brand new ICM and wiring harness

10-15-2011, 06:56 PM
My car is a 98 a4 1.8tq AEB almost 400k on it I just bought an 034 hi flo cat for it now this crap my only other alternative is to rebuild it but there's no complete rebuild kit available and I'm unable to find a complete exploded diagram of the engine and it's components

10-15-2011, 07:14 PM
Check for part numbers. Similar to this.
I dont recommend ebay parts, get Bosch. Only for reference of what to look for. On top of the air box, below the trim cover. Cant miss it.

10-15-2011, 08:39 PM
I'm new here also, just purchased a 1996 A4 Quattro and the person I'm purchasing it off of is replacing a few parts before picking it up next week. He is replacing the intake because the box was not there when he had purchased the vehicle a few months ago and this was his new "project". My question to you is, he has stated that there was a misfire in cylder 3. He thought maybe the coil pack, till he replaced it and the misfire continues. So he's replacing the wires and plugs next. Now because the air box ISN'T there, do you think that is possibly the issue? If so what kind of options so I have? (I believe he will go ahead and fix it anyways, since he promised (in a written argrement that the parts/issues would e resolved upon receiving the car.) Will the air box need replaced, along with this ICM?

10-16-2011, 09:48 AM
no the airbox isnt mandatory jus put a cone filter but the connection and all other things that would be attached to the airbox need to be the ... im taking out my airbox to modify it i want to fit a filter into it using the same dimension of the box hopefully the most i would have to do is cut part of the box and fibreglass it

10-16-2011, 09:51 AM
thanks for all the help and info

10-16-2011, 03:37 PM
PM me your email address and I can send you the pdf for the engine. Its actually for the B5 Passat, but its completely the same motor and such.