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Registered
Join Date: Jun 2007
Location: San Angelo, Texas
Posts: 412
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Fuel Injector Harness Electrical Question??
Hey Guys, Well getting to the end of what I can find wrong with my car, getting to be a pain! Doing a few checks and went to the Clarks Garage. Started a few tests. Got to the test to check the Injector Harness. Said to turn the key to the on position and check the Harness for 12VDC One connector you will have the 12VDC and the other harness you will read zero. Well did the test, and I have the full voltage in both lines? What would cause this? I have figure that I have a problem with the computer and it is not letting the correct voltage to start it, so I am wondering if it is putting voltage where it should not be. I noticed that when I did get my car started, with starting fluid, and run for a few mins, the DME Relay was pretty hot, should not be hot for only a few mins of running. Thanks for the help.
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I Love the Smell of Jet Fuel in the Morning! 86 Silver Porsche 944 N/A - Alpine CDA-9857 KYB Front, Weltmeister 250lb springs, MSD Master Blaster Coil, K&N Cone Filter, Blue LED Dash, Clock and Defrost Upgrade http://www.c28.com/?adid=st&iid=25349 |
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09-19-2008, 09:19 AM
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Greasy Member
Join Date: Mar 2006
Location: Indiana
Posts: 1,457
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Actually, what you have found is correct.
The injector harness should show +12v at both terminals, the DME switches one terminal to ground to fire the injectors. If the connectors had + and - 12v, then the injector would be open all the time, thus dumping fuel without cranking the engine. I have seen DME relays get warm after alot of driving, but never that quickly. You might look at replacing it. Have you tried the jumper technique? As for your other post, the fuel pump will not run until the key is turned to the "start" position. Good luck! -Nick P.S. sending PM now
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Owner: Bennington Motorsports www.benms.com Sponsor for Midwest Region 944-SPEC racing series -When was your timing belt changed or tensioned?? -Yes, I'm the crazy man that will loan out my 9201. Just PM me, I will add you to the list and get it out ASAP. |
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09-19-2008, 09:55 AM
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Registered
Join Date: Jun 2007
Location: San Angelo, Texas
Posts: 412
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NOt sure about the jumper technique. I have dont the checks from clarks, and the fuel pump works, if that is what you mean. I ahve 2 DME Relays. one new and one old, they both did the same thing. Thanks for the info.Mike
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I Love the Smell of Jet Fuel in the Morning! 86 Silver Porsche 944 N/A - Alpine CDA-9857 KYB Front, Weltmeister 250lb springs, MSD Master Blaster Coil, K&N Cone Filter, Blue LED Dash, Clock and Defrost Upgrade http://www.c28.com/?adid=st&iid=25349 |
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09-20-2008, 06:41 AM
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