Hi all,

i have a MB wagon 1991 300te-24 (w124)
the idle is about 2000 r.p.m . when i take out the electrify connector out
from the idle air/speed control valve the idle goes straight away to 600 r.p.m
at drive, and 900 r.p.m at N or parking position.
when i connect back the idle air/speed valve electrify connector while motor is still running the idle stay low on drive (600 r.p.m) when i start the A/C the idle drop to 500 r.p.m, so there is no idle correction.
if i turn the ignition switch to off position and straight away start the motor the idle is o.k around 800 r.p.m and stay when i start the A/C.
i couldn't find the cause for this phenomenon, and now i'm driving with the idle/air valve disconnected.
i changed the idle/air valve with another one and the same problem appears.
i looked for air pulling from the pipes but its seems to be o.k
6 month ago i had a problem of low idle (400 r.p.m) , sometimes
the engine goes out, and at drive the abs lamp blinked. i replace the ovp
relay and the mas unit with a new one and that solve the problem.

if anybody has a tip, what is the reason to this problem pls let me know.

i have another problem, a harden start, only when the
engine is cold. i think it's could be a bad injectors is it a good idea to buy a new set of injectors. (the ignition distributor cap and the rotor are new)


THANKS OFER