I have a 1985 380e and it is idling high. It revs at about 2000 rpm when in “park” and then when driving at a stand still it revs at 1600 rpm this is high. Also to stop the car I almost have to put both feet on the brake since the high rev, and then when I take the feet of the brake it takes off like a bat out of hell.

Ok were should I start looking what could be wrong?


Thanks

The idle control modules are known for bad solder connections on the circuit board. It is a black module about 4" square by about 1 1/2" thick - probably part number 002 545 33 32. Try tapping it to see if the idle varies. It's located in the dual firewall area.

Check the valve on the intake manifold. Carbon likes to build up and get these valves stickey. Try giving the valve 12 volts across the two terminals and see if it moves. It should move freeley. If the valve moves freeley try measuring the voltage at the valve. About 5 volts is normal. No voltage and you should start with the fuse. If the fuse is good sometimes the wires between the valve and the computer are bad. Check the wires out. Good luck. John