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bryske bryske is offline
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Join Date: Feb 2012
Posts: 36
Porsche 944 - only stays running via throttling

Hi "pelicans" :-)

I hope for a little guidance.
I've got a Porsche 944 (late 1985, 8V), that only can run if you constantly are throttling the accelerator pedal. It won't run in Idle by itself. And if you keep the accelerator at same level it also dies. You need to keep pumping the throttle in a systematic way to keep it alive. It seems to be something like. No throttle (1 sec) - 75% throttle (1 sec) - No throttle (1 sec) - and so forth.

I've tested via Clarks garage instructions:
DME temp sensor -> OK
AFM -> OK
Alternator and battery -> OK
TPS -> replaced (I though it was the problem) -> OK
Fuel pressures -> OK (29 PSI and 36 PSI)
Ignition wires + spark plugs + ignition cap + ignition rotor -> replaced -> OK
Idle screw adjustment -> OK

What's next to do? And also if you got inputs on how to do, it's appreciated.

Didn't test ISV yet, don't know how to do it?

Thanks for any help in advance.
Old 02-06-2024, 11:18 AM
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