2006 A4 2.0T Avant Idle/Hesitation Issues?
#1
2006 A4 2.0T Avant Idle/Hesitation Issues?
OK...so I now have my long awaited 2006 A4 Avant on the road however from the 1st day I received it (5 months ago...I know torture seeing it sit there but not be able to drive it) it was running rough.
I was getting the ever so common idle fluctuations ranging from 700 rpm in park to all of a sudden 2000 and then down again. I got a CEL the other day and it was a P0171 System too Lean (Bank 1) code. Now I cleaned out my MAF with electrical contact cleaner and checked the boot/hose and there does not seem to be any leaks. Fuel filter I have not swapped out but it could be a culprit although a slim chance possibility. When at a stop light the car runs pretty rough and if I take my foot off the brake, the car moves forward but surging along with the idle fluctuations. If I put her into Neutral, the idle stays around 800 but if I give it gas, the idle starts to go up and keeps going up to 2000 or so and it stays there until I drop it into Drive.
When I am driving (this could be a tranny thing and not engine related) but I press on the gas from a stop and it seems like there is a lag for a second or two and then it takes off. When breaking and the car gets down to around 25 km/h the transmission likes to almost slam into a lower gear. Is that normal for the tiptronic transmission or could this also be related to my engine issue? I have always had 5 speeds so these transmissions are new to me.
Think I should start swapping out some vacuum lines and the PCV or what do you all suggest I try? Thanks in advance guys, always appreciated!!
I was getting the ever so common idle fluctuations ranging from 700 rpm in park to all of a sudden 2000 and then down again. I got a CEL the other day and it was a P0171 System too Lean (Bank 1) code. Now I cleaned out my MAF with electrical contact cleaner and checked the boot/hose and there does not seem to be any leaks. Fuel filter I have not swapped out but it could be a culprit although a slim chance possibility. When at a stop light the car runs pretty rough and if I take my foot off the brake, the car moves forward but surging along with the idle fluctuations. If I put her into Neutral, the idle stays around 800 but if I give it gas, the idle starts to go up and keeps going up to 2000 or so and it stays there until I drop it into Drive.
When I am driving (this could be a tranny thing and not engine related) but I press on the gas from a stop and it seems like there is a lag for a second or two and then it takes off. When breaking and the car gets down to around 25 km/h the transmission likes to almost slam into a lower gear. Is that normal for the tiptronic transmission or could this also be related to my engine issue? I have always had 5 speeds so these transmissions are new to me.
Think I should start swapping out some vacuum lines and the PCV or what do you all suggest I try? Thanks in advance guys, always appreciated!!
#3
Re: 2006 A4 2.0T Avant Idle/Hesitation Issues?
Hey 1move,
Engine model is in the title of the thread
I VAG'ed the car initially to get the P0171 and cleared that but it just eventually comes back the same day. I can try a throttle body alignment and see what happens I suppose but I think something more is at play. Cheers for the reply!
Engine model is in the title of the thread
I VAG'ed the car initially to get the P0171 and cleared that but it just eventually comes back the same day. I can try a throttle body alignment and see what happens I suppose but I think something more is at play. Cheers for the reply!
#5
Re: 2006 A4 2.0T Avant Idle/Hesitation Issues?
#6
Re: 2006 A4 2.0T Avant Idle/Hesitation Issues?
Sometimes you might not be listed for a recall, but part might be bad.
Problem that you have is one or combination of following:
1. Bad fuel pressure regulator valve
2. Defective Coils
2. Bad PVC valve
3. Torn DV valve.
#8
Re: 2006 A4 2.0T Avant Idle/Hesitation Issues?
Also I have checked my coil packs, all good as too are the plus and wire harness. When it comes to vacuum hoses, well there are so few compared to my 1.8T. Thanks for the replies thus far guys!
#9
Re: 2006 A4 2.0T Avant Idle/Hesitation Issues?
You have to do to the dealer and check if you are affected. I bought my car brand new and never received any recall information by mail(only some pages for the service manual)
Sometimes you might not be listed for a recall, but part might be bad.
Problem that you have is one or combination of following:
1. Bad fuel pressure regulator valve
2. Defective Coils
2. Bad PVC valve
3. Torn DV valve.
Sometimes you might not be listed for a recall, but part might be bad.
Problem that you have is one or combination of following:
1. Bad fuel pressure regulator valve
2. Defective Coils
2. Bad PVC valve
3. Torn DV valve.
Technically I should pull a code if my coils were toast as it would cause a misfire.