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Join Date: Mar 2010
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911 84 wont start.

Ok guys, I've been searching the threads here for 3 days now, tried as much as I understand but the car still wont start
Here we go:
After about a 45 min drive, the car stalled on idle when returning home.
After several attempts cot it bag in the garage. After that it will not start.
So first thing was to get a new DME relay.-Installed-No start.
Starter gas- Car will run for 3-4 sec.
If cranking is repeated it can fire for 1-2 sec but no respond when pressing the gas pedal.....
Hottwire the fuel pump and it runs fine.
Result-Got igniting but no fuel.....

Clue any one?

All the best
Stefan

Old 06-11-2012, 01:49 AM
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KNS KNS is offline
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There are the other "usual suspects": head temp sensor, reference sensor.
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1984 911 Carrera
Old 06-11-2012, 06:25 AM
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heiliges blechle!
 
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Even though your fuel pump runs when you hot wire it, the pump might not be pushing any fuel. There is a test in the Bentley to test fuel pressure and volume. If fuel came out at any pressure though it is probably good and also test the injector harness/signal with a noid light - either order I guess - to see which direction to go. If you are getting a blinking noid light and fuel pressure then look at clogged/bad injectors.
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Old 06-11-2012, 08:20 AM
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Bill is right. I jumpered the DME to test the fuel pump, and it hummed....which temporarily led me to believe that it was working. To make a long story short, I replaced the fuel pump which solved my problem.
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'88 Cabriolet, using EP Slick 20w50 partial synthetic Snake Oil...just as Rommel intended.

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Old 06-11-2012, 08:30 AM
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Tx guys,
First thing to tomorrow I'm gona measure the fuelpressure. I just have a gut feeling that's my main problem. The temp sensors are next!
Old 06-11-2012, 09:44 AM
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Got it running with a new fuel filter :-)

//S
Old 06-13-2012, 01:39 AM
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that's good news!!!

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'88 Cabriolet, using EP Slick 20w50 partial synthetic Snake Oil...just as Rommel intended.

Deny Everything; Admit Nothing; and Always Make Counter-accusations
Old 06-13-2012, 09:23 AM
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