ok so i have a 03 a4 1.8T i just got 4 codes yesterday, when this all started i only got one, which was p0171, running to Lean. so then yesterday it was starting to run rough at idle and sitting in park, and CEL came on again. so i went to oreiley autoparts and got them checked out... turns out i got 4 codes.. one is the fuel to lean, 2nd is "random or continuous misfire", 3rd is "cylinder 1 misfire", and 4th was "cylinder 2 misfire". so i asked them what could be wrong they said coilpacks... i just got new coilpacks from the dealer about 20k miles ago. and i have new Denso spark plugs in it. what else could be causing these misfires? they also said the Crank position sensor? i have that but i havent replaced it yet because the head on the screw is stripped. so what other possibilities could the rough idle and misfires be? it comes and goes with the misfires. some times when im running the car it will happen and some it will not.. when i drive the car it is great, but just not at idle. help!

 

Most likely just the coil packs since they are known to go bad very often. When you changed your coil packs did you buy another set of push down coils and which version did you buy? Most B6 owners tend to upgrade to the "E" version which is the bolt down coils from the 2000. If you need I have 8 used E version coil packs that I will not be using any more. If you want to buy them to see if it gets rid of the misfire issue let me know, if it doesn't you can send them back and I will refund you everything but the shipping.

What type of Denso spark plugs are you running? Because iridium plugs dont do so well in our cars and you should only run copper plugs in a 1.8t.

 

well the coil packs are from the audi dealer, so there OEM plugs.. and they have about 20k on them, i still have the Original coil packs that came with the car when i bought it.. and they are making it do the same thing, my car has 78k on it. and i replaced the coils with new ones at about 55k or so. but the plugs are just two electrode densos from autozone. they were expensive. how much are you willing to sell me 4 of the E coil packs for ? cause im on a tight budget.

 

could it possibly be the injectors? or MAF? and where are the Injectors and are they easy to replace?

 

UPDATE!. ok so i was tinkering around with my car and i got the injectors out.. inspected them and swapped injectors 1 and 2 and put those two in 3 and 4s spot from front to back..... and i was still getting problems. i also did the same thing with the coil packs and its still all switched around and im still getting cylinder 1 and 2 misfire. wtf!!? what else could it be?

 

Change out the plugs.

 

Karma? What do you think Jamie?

https://www.audiforums.com/forum/sho...d.php?t=123218

 

i recently had the same thing happening to mines! CHECK UR OIL DIP STICK! my dip stick was loose so it thru out 3 to 4 codes all the time.. system too lean and misfire cylinder 1 2 and 3....