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Autobahn Garage
Join Date: Jun 2003
Location: Ohio
Posts: 1,546
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930 no fuel presure?no power to pump
I have a 88/911 turbo, I can't get the fuel pumps to run. If I jump the relay the car will run!!. Here is what I have done,[1] checked all the fuses [2]checked the relays, they are good,[3] there is power getting to the coil of the relay but no ground, if I ground the relay on #86 the pump will run and the car starts up???This works on both relays. I guess I need the wire diagrham to see what grouds the relays out. Or if somebody else has had this problem before and could help me. Any ideas?? Thanks
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T Tanner 76, 911s w/ Webers 76, 914/4 57, Speedster |
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11-03-2003, 12:58 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,470
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there's an overboost switch on the intake that needs to be connected to a white wire, and the overboost relay is the tall yellow one on the engine compartment fuse board. the relay can get tilted over, and the wire can come off the switch. end result, the fuel pump relays don't function.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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11-03-2003, 01:25 PM
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Heck, I’m only 5 not 71!
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I don't know if the factory alarm system is the same or similar to the SC model alarm. The following applies to the SC model. Is there a factory alarm system installed, the alarm can prevent the fuel pump from coming on if there is a problem with it. If the alarm control unit fails it will prevent fuel pump from working even if you shut the alarm system off.
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Pat Henry Targa80 1980SC Targa (Mocha Brown) Last edited by targa80; 11-03-2003 at 01:30 PM.. |
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11-03-2003, 01:27 PM
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Registered
Join Date: Jan 2002
Posts: 650
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Mr. Walker is correct.
Simply ground that boost switch wire and see if it starts. I went through two of those boost sensor in a few months. I think my fuel pumps are getting old and one of my relays was stuck causing the pump to run constanly and the switch burned out. I could feel the ground wire getting very hot!!!! I gave up on mine and filled the switch with solder and welded it closed. Permenant ground....no more problems......but no overboost protection. With a new relay, the wire stays cool and everything is fine. Tinker |
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11-03-2003, 08:13 PM
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Autobahn Garage
Join Date: Jun 2003
Location: Ohio
Posts: 1,546
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Thanks guy's I'll look into this more and let you know what i find!!! Thanks again TAB
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T Tanner 76, 911s w/ Webers 76, 914/4 57, Speedster |
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11-04-2003, 02:27 PM
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