misfiring problems

[hiprings]

i had a local shop take a look at my car, as it sounds like its diesel.
they plugged it in and found one cylinder is misfiring and theres a random misfire somewhere. and an oxygen sensor is bad.

i changed my plugs and wires. next step is the coil pack.

think this will solve the problem? or might it be something more difficult to fix?

[GetBoosted84]

Swap the coil pack on the misfiring cylinder with a good one... if the misfire follows the coil pack then replace it.

[hiprings]

i dont have individual coils.
its a 30V V6 so its just a single pack.

[hiprings]

well, replaced the coil pack.
$207 later, still sounds like its misfiring.

i dunno what else to do now

[FknChizA4]

lol me and u got the same problem bro. i changed my plugs coil pack, close 2 dropping 1K now.. let me save u some money and tell u to check ur igniter module, dats what the mechanic told me to do. its the reason the car has sudden misfires and makes my car sound like a diesel, pluse it shakes and is embarrassing to drive around, pluse my cars hp goes down when it starts acting up. its like it goes in and out. one min im struggling 2 reach 45 mph and when it kicks back in 2 shape my car pulls out of nowhere its really annoying. but yah check it out get at me to see if u get that fixed.. il let u know how it goes

[djwimbo]

well, replaced the coil pack.
$207 later, still sounds like its misfiring.

i dunno what else to do now

as long as you installed all the plug wires and such correctly your ignition source isn't the issue. Obviously check for spark at the misfiring cylinder though.

You need fuel, air and heat/spark to cause combustion, have you checked compression of the faulty cylinder? Otherwise swap fuel injectors or at least make sure that fuel injector is receiving a signal from the ECM.

let me save u some money and tell u to check ur igniter module

The 30V V6's should have their ICM built into the coil pack assembly(IIRC), he changed that already. 1.8T and 2.7T's have the igniter/ICM on top of the air box.

[hiprings]

finally an answer on the icm.
i'm going to do the compression test this week, gotta find someone who's got the tool.

i have the same exact problems as FknChizA4.
sounds like diesel, shakes, and it just sucks to be the kid with the audi, and have it not run right. lol

[FknChizA4]

k. i got it tested and changed my plugs, also coil packs, they run the air pressure test on all 4 cylinders n code says cylinder number 2 is the prob. so we looked at the ignition module which sits on top of my intake, and if we wiggle it just right the car will go from diesel to normal ... seems like one of my wires might be fucked up some where down the line, kinda like an old charger that u gota hold in a wierd way just to be able to charge ur phone datz how my car acts... i looked up igniter module and it says that it is the reason for sudden misfires and makes it look like ur plugs and coil pack might have gone bad.. so do u still think that might be my prob ??? P.S hipring have u tried wiggiling the IG module c if ur car goes from diesel 2 normal??

[hiprings]

coil pack=fixed misfire.
still sounds diesel but my car's still throwing codes for bad o2 sensor and secondary air injection somethin somethin...
but i need this hose and a new o2 sensor and we'll see what happens...

[B5Quattro190]

i had the same problem with my 98 a4 2.8q tiptronic back in august, as cylinders 4 and 6 both misfired due to cracked lines and had to have both of those replaced. the bucking was caused by that and thus as you both described, for the car to shake a lot, and it not being responsive at times.

[FknChizA4]

yah im actually going to change the whole wireing

[FknChizA4]

ok guys so i changed my ingnition module and it fixed my diesel problem... and misfireing .. u need a bosh Ignition module i got it for 150

[B5_S-LINE98]

ok guys so i changed my ingnition module and it fixed my diesel problem... and misfireing .. u need a bosh Ignition module i got it for 150

where did you get it from. is yours a 1.8t or a 2.8Q??

[hiprings]

where did you get it from. is yours a 1.8t or a 2.8Q??

he's got a 1.8t
at least his profile says so

[sirmeeps]

Ok so this ICM can someone show me a picture of it? Also hiprings does your car backfire through the exhuast when it bucks and spits?

[hiprings]

do you have a 2.8?
and the misfire is gone, so i couldt tell ya about backfiring...

[sirmeeps]

do you have a 2.8?
and the misfire is gone, so i couldt tell ya about backfiring...

Yes, DID it backfire through the exhaust?

[hiprings]

i don't recall any backfiring...just some sputtering.
and i looked into it and there is no ICM on the 2.8

The 30V V6's should have their ICM built into the coil pack assembly(IIRC), he changed that already. 1.8T and 2.7T's have the igniter/ICM on top of the air box.

[sirmeeps]

i don't recall any backfiring...just some sputtering.
and i looked into it and there is no ICM on the 2.8

Cool thanks man nevermind this isnt going anywhere...

[hiprings]

am i just not getting something here?

[sirmeeps]

am i just not getting something here?

No it just seems to me like im having a different problem than you bc I believe my coil is still good. Im pretty sure its my plug wires... Just kinda relucatant to drop 150 on wires and then that solve the problem....Just lookin for insight cause im stumped....

[hiprings]

well, if it makes you feel any better, i dropped about $400 total to figured out this stupid problem.

$200 on the coil
$160 on wires
$40 on plugs

im no mechanic, so im really not a huge help.

[sirmeeps]

well, if it makes you feel any better, i dropped about $400 total to figured out this stupid problem.

$200 on the coil
$160 on wires
$40 on plugs

im no mechanic, so im really not a huge help.

Haha thanks man no problem... Hopefully I can get this figured out without dropping that much, but hey, at least those parts are new on your car now right?

[hiprings]

oh yeah, i figure once everything breaks and is replaced, what can go wrong?

[TverRus69]

Im having the same problem. It started about 2 weeks ago. Car sputters and backfires at low rpm under load (usually in 2nd or 3rd) and if i floor the gas i get the flashing CEL (as expected) and jerky acceleration. Hiprings how long did it take you to change the coilpacks? Where exactly is it located? I really dont want to be dropping 150 on new coils... Why couldn't i have a 1.8 and swap the one thats bad...

[FknChizA4]

i got my ignition module off this VW AN AUDI repair only... i got a 1.8t

[FknChizA4]

p.s it has to be the easiest thing to do...

<a href=" http://www.shokan.com/catalog/images/hamburg%20tek.JPG
" border="0" /></a>>