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View Full Version : Noob Question: 1.8t AEB, which is cylinder #1,#2,#3,#4?



JW Spencer
06-17-2009, 08:12 PM
I searched but could not come up with an answer to my question. Which is cylinder 1,2,3,4? I don't have a Bentley manual. I am attempting to VAGCOM diagnose my flashing CEL problem. Figuring that cylinder #2 had to be one of the middle two cylinders, I swapped the middle two coils and I still am still getting a cylinder two missfire, am I correct in concluding that my problem is with the ICM?
Thanks,
jws

somebody5788
06-17-2009, 08:15 PM
Correct me if I am wrong but cylinder 1 is the one closest to the Timing belt.

97a41.8t
06-17-2009, 08:16 PM
Correct me if I am wrong but cylinder 1 is the one closest to the Timing belt.

Correct.

J Ozzie
06-18-2009, 09:24 AM
1 closest then 3 2 4 ? = Firring order but its straight forward. Cant get lots... 1, 2, 3, 4..

ghost6303
06-18-2009, 09:40 AM
1 is near the front, 4 is near the firewall, it goes 1 2 3 4 but that is not the firing order.

Seerlah
06-18-2009, 10:34 AM
If VAG com still says it is a 2nd cylinder misfire, sometimes VAG Com messes up (or it does not register) and it would still say the misfire is in the same cylinder after swapping to test. My suggestion is to have a 3 scan confirmation that it is indeed still in the 2nd cylinder. After that, check the spark plug (spark plug swap just as was done with the ignition coil if you don't see it fouled and the gapping is correct. or just swap it just to make sure). After that, check the fuel injector (same swap as all the others). These are the cheap solutions and should be checked before spending money on a new ICM. Though it very much could be the ICM (almost posotive), it is better to weed out other variables before spending money. Also, clean your MAF with CRC MAF cleaner.

If it is the spark plug, replace all 4. If it is the fuel injector, first try Lucan Fuel Injector Cleaner on a full tank of gas. Then replace if necessary. If it is an ignition coil, then replace as necessary. if it is the ICM, then replace as necessary. If it is the MAF, replace as necessary.

djwimbo
06-18-2009, 10:35 AM
1 is near the front, 4 is near the firewall, it goes 1 2 3 4 but that is not the firing order.

^ What he said.

#1 is up front (by radiator, belts, grille, etc)
#2 and #3 are in the middle, lowest numbers are forward
and #4 is back by the clutch/trans/bulkhead/firewall/battery


Firing order is 1-3-2-4, but I don't know why you would need that since it doesn't have a distributor.

somebody5788
06-18-2009, 11:38 AM
Firing order is 1-3-2-4, but I don't know why you would need that since it doesn't have a distributor.

Can you even plug the coils in the wrong order? I was pretty sure that was near impossible too.

JW Spencer
06-24-2009, 06:13 PM
Thank you for all the help, it was the ICM. $392 list for that little thing; I picked one up from Purems for ~$150. What's inside that thing, cocaine?
jws

burner799
06-24-2009, 07:43 PM
I paid about 80 for mine. common problem on these cars.

brooin8
04-18-2013, 09:46 PM
So on a wasted spark setup, you would have 1, 2 and 3, 4 connected togeather?


^ What he said.

#1 is up front (by radiator, belts, grille, etc)
#2 and #3 are in the middle, lowest numbers are forward
and #4 is back by the clutch/trans/bulkhead/firewall/battery


Firing order is 1-3-2-4, but I don't know why you would need that since it doesn't have a distributor.