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Richy's 1991 Porsche 944 S2 - BEWARE OF SHARN.


Snoozin

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Is this thing old enough that it uses a cold start injector? If so, the issue could be sense wire to starter motor or thermo-time switch.

 

Other issues are that the auxiliary air valves go out of spec over time and need adjustment

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No cold start injector on this thing. These don't use the older AAV type idle control that is adjustable. Later cars with the Bosch Motronic have a solenoid type IACV which either works, or leaks and you get a rough idle. You can see the IACV lurking between runners 1 and 2 on the inlet manifold.

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Glad you got this sorted man, was sad panda when I seen it had died straight away.

Google says people use a $50 aliexpress device to get codes and reset shit on these porches. Worth a look. There’s really not that many things to go wrong and give you the issue, just takes ages to actually work through a process and find the cause vs pray and spray with new parts. 

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Yeah it nearly didn't happen. But nevermind.

I'll try to do this methodically instead of frittering money on parts and trial and erroring it. Old electrics (especially European) are such a pain in the ass but luckily all the tables/charts with what I should be seeing at the ECU end are pretty easy to come by and even a dunce like me can understand most of the diagnostic procedures.

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