924Board.org

formula05 · Joined: 19 Oct 2004 Posts: 32 Location: miami,fl

The Porsche starts up then shuts off after 5 mins. It has new spark plugs, fuel pump, fuel filter, gas filter, air filter, battery , refference sensor and ignition coil. Its an automatic in case that matters(which i doubt). I checked all the grounds , the dme. Its starts up fine but after 5 mins it shuts off then when i try to re-start it, it wont restart unless i wait like 10 mins. If any has any ideas please reply thank you.

(Thanks for those of you who posted last time trying to help me.)
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1987 Porsche 924
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1987 Porsche 924

Paul · Posted: Sat Nov 20, 2004 9:36 am Post subject:

I'd try a DME relay next...

formula05 · Joined: 19 Oct 2004 Posts: 32 Location: miami,fl

I had it tested in another 924 and it works perfect.
thanks
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1987 Porsche 924

Paul · Posted: Sat Nov 20, 2004 9:39 am Post subject:

Yeah, I just read your last thread again....

What does it do when it shuts off? Say you going down the road and it dies....

formula05 · Joined: 19 Oct 2004 Posts: 32 Location: miami,fl

It just shuts off like if i hit the ignition key in the off position. the lights stay on and everything.
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1987 Porsche 924

Paul · Posted: Sat Nov 20, 2004 9:45 am Post subject:

So say you are going about 50 mph in 5th gear, does the tach needle immediately drop to zero or does it spool down with the motor?

formula05 · Joined: 19 Oct 2004 Posts: 32 Location: miami,fl

Yeah the motor shuts off quick and the rpm tach just drops straight down to 0.
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1987 Porsche 924

Paul · Posted: Sat Nov 20, 2004 9:51 am Post subject:

I'd but a voltmeter on the + of the coil and ground the other lead. Then place the meter where you can see it and run the car until it stops. See if the voltage drops.

Have you checked the ignition switch?

How did you check the DME?

formula05 · Joined: 19 Oct 2004 Posts: 32 Location: miami,fl

I havn't checked the ignition swith yet. I checked the Dme by putting it in another 924 and it started fine and ran without a problem. This may sound stupid but i have a vold meter i just dont know how to use it. What setting do i put it in so i can read the voltage.

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1987 Porsche 924

Paul · Posted: Sat Nov 20, 2004 9:55 am Post subject:

You should have a setting that says "DC Volts"

formula05 · Joined: 19 Oct 2004 Posts: 32 Location: miami,fl

Im going to do that when i get home today. The reason i asked you that is because the one i have has 2 different dc's.
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1987 Porsche 924

Paul · Posted: Sat Nov 20, 2004 10:00 am Post subject:

Is it an analog (has needle) or is it a digital one? What brand and model is it?

formula05 · Joined: 19 Oct 2004 Posts: 32 Location: miami,fl

I have no idea. I bought it a few months ago. It has a digital screen and has two prongs with needles. One for pos. and neg.
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1987 Porsche 924

Paul · Posted: Sat Nov 20, 2004 10:02 am Post subject:

The next time it won't start, pull the electrical connector to one of the injectors and see if it will start.

Paul · Posted: Sat Nov 20, 2004 10:04 am Post subject:

Time to take the wife out for dinner, I'll check in a few hours and scotches....