Question about 1987 Porsche 944

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1987 944 turbo when started cold will only rev up to 1200 rpm. then hits a dead spot, when i let off it resumes running fine until it warms up then runs fine

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  • Tom Kent Jun 16, 2013

    I have the same problem. Did you determine what the problem was?

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  • Porsche Master
  • 14,036 Answers

COLD START VALVE COULD BE DEFECTIVE.IF YOU ONLY HAVE PROBLEMS WITH COLD START UP.

Posted on Mar 31, 2011

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Posted on Jan 02, 2017

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Your toyota technician should know what a "cold starting solenoid" is. It is the little thing that works your throttle until the motor warms up and something else takes over. I'd suggest going to another technician.

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Good day: I don't accept that cold starting an engine at 2000 RPM is OK. Those immediate revs on a cold engine are wearing out parts that need oil lube and warm-engine clearances. Is there a simple way of...


I have heard that Fords theory behind that is to supply maximum oil pressure to moving parts sooner. All the Ford products do this and the motors last well into the hundreds of thousand of miles. I wouldn't be to worried about it since there is no issue with it to my knowledge and there is no way to limit the cold start RPM's.

Cold start warm ups are a thing of the past. Better lubricants, engines, fuel injection and other computer controls have made start ups easier on the engine. 30 seconds is barely enough time to warm up anything and after a few seconds oil has already reached all of its intended lubricating points. That first few seconds is the hardest on the engine. Regardless of how any RPM's it is turning.

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Check the temperature sensor feeding the ECU and O2 sensor.

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When I start the engine from cold it runs on high revs too long


Hi ..... This sounds as if it's fitted with an automatic choke, as long as the revs drop when it's warm there is nothing to worry about. The indication when these start to go wrong is that the car won't start when cold ................ even then any decent mechanic can fit a normal/manual choke.

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Problem might be the air control valve, it's located at the right side rear of intake manifold and has a hose going to the air intake duct from the air cleaner, as a test you might try pinching off that hose when the idle is a problem.

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