Question about 1986 Porsche 944

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944 turbo throttle dropout problem

1986 944 turbo, 165,000 miles, standard transmission; Throttle drops out sometimes only during driving conditions. When I am driving, the throttle will cut out completely, wont restore untill I put the accelerator back to idle position, then throttle returns to normal, sometimes recurring again after I accelerate again. This happens alot. Engine idles fine, and has never cut out at idle. Car was stored outside for many years. Any ideas would be helpful. 1986 944 turbo w/80,000 miles. Starts & runs great at idle and up to 1,600 rpm. Frequently will not go past this speed. When it's coaxed to go past 1600 it runs perfect, up to 6,500. When rpm's drop below 2500 it resumes the problem and doesn't want to go past 1600 again. It is getting progressively worse and very difficult to get it past 1600. It doesn't seem to be sensitive to temperature. This car is a daily driver and is in outstandingly good condition.

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I gave my 944 turbo which had a idle problem. checked all the vacuum
attatchments, made sure all were connected. Checked coolant level.
Then cleaned the fuel pressure (part). ie the fuel rail attatchment, with carburettor cleaner then sprayed dry lube into it. Its running like a dream again. This part i am talking about has 3 inlets and is at the front of the fuel rail, when you take it out fuel runs out of it for a little while.
Hope this fixes the problem.

Posted on Oct 02, 2009

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I have exactly the same problem now. How did you manage to fix it?

Posted on Aug 11, 2009

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I would start with the TPS, and if it doesn't solve it then the AFM would be the problem.

Posted on Jan 12, 2009

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Tip

How to use your car, so that it can last longer.


Drive gently and avoid high speeds.<br /><br />Your vehicle does not need an elaborate break-in. But following a few simple tips for the first 1,000 km (600 miles) can add to the future economy and long life of our vehicle.<br /><br />Avoid full throttle acceleration when starting and driving.<br /><br />Avoid racing the engine.<br /><br />Try to avoid hard stops during the first 300 km (200 miles).<br /><br />Do not drive slowly with the manual transmission in a high gear<br /><br />Do not drive for a long time at any single speed, either fast or slow.<br /><br />Do now tow a trailer during the first 800 km (500 miles).<br /><br />Good luck.<br />

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