Hi guys and gals. My Audi A4 B5 2000 model non turbo, is giving me problems.. Whenever I reached like 3000-4000 rpms my car would jerk and bout 3days ago it wouldnt go faster than 70km/h. So I took it to mechanics and they scanned it so a whole lot of faults came up such as, labda sensor Oxygen sensor, throttle body, and something like Air out of tollerance or so and Engine control unit. Now we unplugged everything from air box to throttle body and cleaned all the pluggs, we plugged it all back and cleared the faults and scanned again. Just ECU comes up nw, bt then when unplugged Airflow sensor and she revs up nicely bt idles shitty, when we plug it back it will idle bt not rev up? Any ideas pls guys? I reeeeaallly need my car running asap. I have replaced fuel filter and fuel pump allready, as that was the 1st thing we thought it could be

 

Its your throttle body you need it ajusted im dealing with the exact same problem.i need someone in the DENVER AREA WITH A FULLY REGISTERED VCDS TOOL TO RESET MINE U
I WILL PAY PLEASE HELP ASAP....

 

Check the crankcase ventilation system for cracks or splits etc, also its 1 way valves, depending on the model there could be a 1 way valve in the hose connection fitting on the plastic intake tubing.

Normally on the 1.8 its the fitting that goes into the crankcase. Good news, parts are ridiculously cheap.
Check every part of it so you have all that parts you need when you start the job. Sometimes a red rubber diaphram in the one way valve has gone & its not easy to know if theres theres is to be one there to start with.
On my 8 4 cylinder a4's, 7 needed the CVSystem fixed, all needed that bottom hosepipe replaced.
( From US$4 B6 to US$16 B5 inc 1 way valve, depending on the version of it.

 

Sometimes a red rubber diaphram in the one way valve has gone Kodinox & its not easy to know if theres theres is to be one there to start with.

 

Calling all mobile app developers! We’ve got fantastic news to share this morning!