To all S4 doctors >>!!

[NoLeafClover]

After a night of snow fun which involved high revs, donuts and going sideways my car (engine) now starts shaking almost like choking as soon as i hit 15psi or more . runs perfect if i dont hit 15psis or more. im thinking maybe something got wet but it was 3 days ago, or a sensor went bad, what do you guys think?? I connected it to the vag-com and i had about 3 or four missfires, an abs code G202 yaw rate sensor 01542, and o2 sensor malfunction. we cleared it and i took it for another ride after that and there was no codes but the car is still doing the same thing. Anybody has any idea why or what it might be??

Merry Christmas to everyone
and thanks in advance.

Bler

[Ianxcom]

Maybe you broke or ripped a motor mount?

[NoLeafClover]

Maybe you broke or ripped a motor mount?

i dont think its is anything mechanical it feels more like a sensor problem or plugs. im gonna get to it by the weekend but wanted to get some ideas first from everyone here
thanx
Bler

[NogaroWonda00]

it almost sounds like a bad throttle body boot to me

[Chknkatsu]

do you happen to have a cold air intake?

[///M3 TO S4]

it almost sounds like a bad throttle body boot to me

no, doesn't sound ANYTHING like a tbb problem....

[s42k5b]

no, doesn't sound ANYTHING like a tbb problem....

x2

[espo4442]

Well your o2 sensor i obviously on it's way out so when you start getting up in boost your prob misfiring like crazy

[NoLeafClover]

do you happen to have a cold air intake?

i do have an after market intake but its never done this before

[NoLeafClover]

it almost sounds like a bad throttle body boot to me

could be but i doubt it because my vacum is at -22

[NoLeafClover]

Well your o2 sensor i obviously on it's way out so when you start getting up in boost your prob misfiring like crazy

x2 im thinking the same thing i have to vag it again

[NogaroWonda00]

could be but i doubt it because my vacum is at -22

id check the plugs and o2 like those guys said, is it backfiring after it starts to choke?

[S4 Dan]

unplug your MAF, and try it out... see if that does anything.... also, could be a bad EGT sensor... ususally they throw codes, but the problem you are explaining is similar to what happens to the cars when the EGT's go bad... good luck and merry christmas bub

-Dan

[NoLeafClover]

id check the plugs and o2 like those guys said, is it backfiring after it starts to choke?

no its not backfiring when it does it but it feels like the car is not sparking

[s vier]

Lower intercooler hose boost leak? Donuts and snow will bang around on the bottom of the car. Just a thought

[NoLeafClover]

i just checked it with vag com and its just random missfires. im thinking of changing the plugs and see what happens. thanx for your input everyone

[sideshowbob]

yea man plugs and even the coil pak's. Its usually one of those things. ( high revs, donuts, you know the seasonal impulsive driving habits that everyone i think likes to do) My father had this same prooblem on his A4. check into it.

[NoLeafClover]

yea man plugs and even the coil pak's. Its usually one of those things. ( high revs, donuts, you know the seasonal impulsive driving habits that everyone i think likes to do) My father had this same prooblem on his A4. check into it.

My friend said the same thing, to check the coil packs. im going to switch them and see if i get missfire on the cyl i changed it to. i hope its just plugs though