1985 911 3.2 Misfire when warm

[geebo12]

My 1985 911 seems to run rich and misfire when warm............I can drive her for hours without a problem but once I shut her down and restart, she runs rough and misfires until cool again....any thoughts?

[Steve]

Hi,

Several possibilities about your problem. You didn't mention anything about how many miles are on the car, nor anything about when it was last tuned. Without that info, everything is a WAG.

I would check:

1) Head temp sensor & wiring

2) O2 sensor & wiring

3) Intake manifold ground wires (brown)

4) Fuel pressure at rail

5) Check for cracked distributor cap

This should keep you busy.

[geebo12]

Hi Steve,

The vehicle has 116k and has been maintained throughout.
Fuel pressure is fine
Cap, Plugs, and wires were replaced
I will check the other items you mentioned..............Thank you!