1987, 740 Turbo, will not start when engine cold

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Old 01-08-2007, 08:36 PM
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Default 1987, 740 Turbo, will not start when engine cold

This problem happens only when the engine is cold. The starter will run and run, but no ignition. However,, when I do manage to start it, the car runs smooth and re-ignition is fine. Not long ago I replaced the fuel filter. The car has 125,000 original miles.
What could be the cause?. appreciate advises
 
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Old 01-08-2007, 09:23 PM
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Default RE: 1987, 740 Turbo, will not start when engine cold

Check the fuel pressure regulator.
Sounds like the fuel is bleeding back into the tank.
 
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Old 01-08-2007, 09:39 PM
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Default RE: 1987, 740 Turbo, will not start when engine cold

Tech,
I am not sure how to do it. More details will help me.

Thaks
 
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Old 01-08-2007, 09:44 PM
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Default RE: 1987, 740 Turbo, will not start when engine cold

Pull the vaccum line off the fuel pressure regulator and see if the hose smells like gas.
If it does the regulator is bad.

If not then either and injector is bad or the check valve in the fuel pump is bad.
 
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Old 01-08-2007, 10:25 PM
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Default RE: 1987, 740 Turbo, will not start when engine cold

thanks tech, I will try it in the next day or so. Then get back on that.
 
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Old 02-12-2007, 04:24 PM
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Default RE: 1987, 740 Turbo, will not start when engine cold

Did you solve your problem? I have some similair issues (see seperate thread) and would
appreciate the shared knowledge of what you find/found.

 
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Old 02-13-2007, 02:55 PM
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Default RE: 1987, 740 Turbo, will not start when engine cold

No Kurtz, I did not find it yet. I tried to pull the plug on the ditributer and while starting the engine, I checked for sparks coming. I could not see clear sparks (when I touch the chasis). Frankly we don't use this car very much these days (20 year original owner). I was planning to haul it to my Machanic and have him just diagnost it for me, to find the exact cause of the problem, and replace the faulty part by myself.

 
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