Erratic Idle on 1991 240 sedan

Ragman · Post by **Ragman** » 26 May 2008, 21:57

I've been working on a 91' 240 sedan with 240k kilometers on the clock. It has a K&N air filter, Magnecor wire set, Bosch platinum plugs,new cap, rotor, screens removed from mass airflow sensor and most recently frt &rr pads,rotors,and calipers and a fresh fluid bleed with new flexlines,etc. With the engine running, when I step on the brake pedal, the idle surges and settles again when I release the pedal. I read on the IPD site about the brake booster fitting sometimes causing a vacuum leak and was wondering if this might contribute to the idle surge. Any ideas or input is appreciated.

Post by **MadeInJapan** » 26 May 2008, 23:28

It certainly sounds like what IPD describes.

goldmember · Post by **goldmember** » 27 May 2008, 23:48

get the screens back on the MAF. It won't take much to damage those very fine wires.

Let us know if you fix the problem.

Cheers

George