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Join Date: Sep 2005
Posts: 143
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fuel pump not running on my 73 2 litre
I am starting to lose my cool with this car.Bought it in 2006 and got it registered last month.
Car has had bucking probs which are ongoing,I have changed to a spare TPS.The car runs perfect when cold but on a second test run there is a bit of bucking not major but annoying. I have a spare ECU,correct one for the car so I believe,I hooked it up and went to start the car and there was no fuel pump running,needless to say no start.So I went back to the original ECU and you guessed it, no fuel pump running so no start. All I did was change the ECU,now I have a car that is still bucking and no fuel supply. Anyone help with the fuel pump mystery please,I can live with the bucking but the car is now immobile! |
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06-28-2010, 01:44 AM
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Join Date: Sep 2002
Location: Oakland, CA
Posts: 925
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The fuel pump is controlled by the FI brain ...
- Check the connector on the brain and make sure it is seated correctly. - Did you unplug the brain from the relay board? If so, make sure that connector is seated correctly as well. - Check the fuel pump relay and switch with a known to be good one. The headlamp relays work fine for that.  Andy
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>> 1970, 914-6, 3.6L (Conversion) >> 1970, 914-6, #374 (Original) >> 1975/73, 914 Limo (Custom) |
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06-28-2010, 09:49 AM
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Join Date: Jan 2004
Location: Northern Virginia
Posts: 3,347
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While you are checking relays, it won't hurt to remove the relay board and look at the underside. Not uncommon for the boards to completely "dry out"- look like a dry lake bed - which makes the connections suspect.
Did you check to see if you have power at the fuel pump itself? Maybe the pump has gone bad (especially if its original).
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1970 914-6 Past: 2000 Boxster 2.7, 1987 944, 1987 924S 1978 911SC, 1976 914 2.0, 1970 914 w/2056 |
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06-28-2010, 12:32 PM
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Posts: 143
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Quote:
The connector was not a real snug fit so that could be the problem.I have changed the pump relay to a spare with no change. Where is the switch,or is that in the relay? I left the brain connected to the relay board! Geoff |
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06-28-2010, 02:26 PM
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Join Date: Sep 2005
Posts: 143
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Quote:
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06-28-2010, 02:27 PM
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Registered
Join Date: Sep 2005
Posts: 143
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The latest news is that I checked the pump with 12V and it ran,I then checked the connections from the harness to the pump.
After that I checked the connection to the brain and carefully aligned the plug in and voila the pump ran etc. Thanks Fellers |
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06-29-2010, 12:44 AM
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