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Help! 911 3.2 won't start has spark
I have a 1988 911 with a 3.2 I am trying to get going. It has been re-wired because there was a fire in the trunk.(big stupid sound system destroyed the wires) Everything works as it should(save the motor starting) I have spark and the fuel pump works. If I shoot gas in the intake it runs. No voltage at the injectors though. Why would the engine have spark but no power to the injectors? Any thoughts?
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I should have bought a runner instead of a fixer upper! |
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10-06-2003, 05:15 PM
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DME Relay? Don't really know that must about motronic but it seems that is what all the people on this board say to check first.
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10-06-2003, 05:25 PM
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Join Date: Dec 2000
Location: McLean, VA
Posts: 1,155
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Tom,
Rewired? Who did it? First thing to check is the DME to injector harness - there is a connector on the rear engine bay shelf between the shock towers, adn a harness running to the injectors. If this was damaged and/or repaired, it could be the problem. I have a wiring diagram for the DME if you need it.
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Tony K '89 944T 944 SuperCup Champ 2004 & 2005 '85 Carrera - Sold [sob] TrackVision 944Cup The 999 Site |
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10-06-2003, 05:46 PM
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The Relay is good. I will dig into the wires from the dme to the injectors tomorrow.
Thanks, Tom
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10-06-2003, 05:53 PM
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I found one of the problems. Bad connection between the injector harness and the firewall. Got it to run for a few seconds. I think I need to clean the injectors next. Also it smokes like a pig.
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10-07-2003, 06:27 PM
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Progress! Sounds like you have localized one fairly major source of the non-start problem, and you might have proved that the DME harness and brain is OK [I was worried that the DME brain might have been fried by shorts in the harness during the fire event].
The smoke may be temporary. If the car has not run for a good while, oil would have seeped by the valve seals into the heads. A few minutes of running should clear this. If it still smokes, that is another matter. Keep us posted!
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Tony K '89 944T 944 SuperCup Champ 2004 & 2005 '85 Carrera - Sold [sob] TrackVision 944Cup The 999 Site |
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10-08-2003, 08:14 AM
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1988 Porsche 911 Carrera Targa 3.2
