ok, so i have a 01 s4 and here are the issues. im looking forward to the online diagnostics.
only engine mods are bov's

1) my car will jerk at low rpm occasionally (like a bucking horse), but when im driving hard, its fine.

2) one day i was driving on the freeway, the ECS light and the ABS light turned on, and the car would not provide any power. The motor was still running, but when i press on the accelerator, nothing would happen. when i turn off the car and turn it back on, it resumes on driving fine.

3) during idle, it idles between 1000-1100rpm... really high, and it throws that CEL out.

CODES:
p1128 maf sensor
p1130 maf sensor
p1136 maf sensor
p1138 maf sensor
p0507 high idle
p0102 maf or vaf a circuit low input

I NEED HELP!!!!

 

it'd be nice to see the codes.

you don't have anything done to the car other than bov's? i would think something along the lines of a bad O2 sensor or MAF

 

BOV'S?????? I hope not becuase that could reason for codes. Please Please Please get diverter valves not BOV's.

 

i know s4 owners hate to see one with bov's but i believe i did it the right way... we'll see soon enough lol, getting codes before tonight

 

It could very well be the BOV's, especially if you don't have a tune for them and have them spaced/sprung correctly. They could be opening partially at a certain psi and releasing boost, which could cause the car to throw codes and maybe even go into limp mode.

You need to have a proper tune when running BOV's and have them correctly mechanically tuned for the boost/vacuum.

 

i dont think its the bov's but i could be wrong, i just put up codes HELP

 

hah, common now... you don't know what those codes are telling you to replace?

 

i mean, yeah i KNOW the maf is bad, but could it be causing ALL those issues?

im soaking it in 91% alcohol right now.

 

eh, something else 'could' be causing that issue, but i doubt it. a faulty MAF would cause all those problems.

 

could be a maf.. but bov's might give you a maf code as well.. not all of the air metered is going into the system.. so could look like a faulty maf.. but might also give you a rich code.. i guess make sure you have proper diverter valves and put a new maf on and clear and retest..