Idle valve vibrating on automatic position and map and lambda errors

Topenavi13

Hi, i have had a problem with the idel, i changed the idle valve in case was broken, i changed the tubbings, and the lambda too. but my idle isn`t stable, and i always hear the idle valve vibrating and after 2 lambdas, i keep geting the lambda and map errors and the car struggling to run but starting.

log-jetronic-80-20230323-193707.zip

12kB

JHM

Try to disconnect car battery for 30sec and check if MAP error will come back after ignition ON.

Topenavi13

Okay, that works with the MAP sensor, but the idle valve still vibrates all the time and the idle isn´t stable.
Any help with that please?

JHM

Please record new log file without MAP error.
Also, check if ECU is powered down when ignition is off.

egilic_Audi200

Today I had the similar issue. I got lambda error and then my idle started to jump around(+-100 rpm). maybe bad connection? under load car runs flawlessly.

JHM

egilic_Audi200
Lambda error means that lambda correction is disabled. Mixture can be lean, which can cause idle instability due to lower engine torque.

Topenavi13

Hi, i keep getting lambda errors and idle issues so i can't do the lambda correction calibrations. All the parameters are like on the manual of installation.

JHM

Topenavi13
Record a log from the engine start until error appears