erics944

I'm a new porsche owner. Just got my first 944. its a 1986 n/a 944. When it is in park or neutral, it idles between 1600 - 1800 rpm's. In my opinion this is way too high. Is this normal? What should it be in park/neutral and when it is in gear stopped at a stoplight?

v944god

I thought it was a little below 1k rpms when its been warmed, and the oil temp is at the normal level.

iloveporsches

900 RPM i think.

led

I think there's a sticker on the engine bay by the washer reservoir that says 900 +/-50 RPM

adrian_jaye

auto boxes might be different

Charlotte944

Your idle is WAY off, so you need to do some "tweaking."

Late model engines ('85.5 and later) use an Idle Stabilizer to control the idle speed, which BTW should be 840 +- 50 RPM.

To set the idle you need to disable the Idle Stabilizer by placing a jumper wire between pins B and C of the Diagnostic Plug. The plug is located on the driver side fender between the wheel hump and the firewall.

Connect a Dewll/Tach to the ignition coil (black to ground, test lead to the green wire on the coil), start the engine and let it come up to temperature.

With the engine running, jumper pins B and C. Using the mechanical idle by-pass at the throttle body, adjust the engine RPM to 840 +- 50 RPM. Remove the jumper, disconnect the Dwell/Tach.

If adjusting the idle by-pass does not correct the problem, then chances are either someone has "tweaked" the mechanical stop on the throttle body, or you have a serious vacuum leak.