What'd I do now? New clutch, no fuel pump running |
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What'd I do now? New clutch, no fuel pump running |
914bub |
Aug 31 2014, 12:13 PM
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#1
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Member Group: Members Posts: 433 Joined: 16-August 13 From: Modesto CA. Member No.: 16,260 Region Association: None |
Hey guys I need some help.
I got my 914 9 months ago. I traded it straight across for a car that a friend of mine wanted. The deal was we would both get each car running before the trade. The 914 needed a fuel pump and some tuning. It arrived running but needed a clutch and a master cylinder. I got the clutch done and now the car won't start. I've got power to two of the pins at the fuel pump relay but no power down to the pump. I "think" the relay os clicking but need to get an extra pair of hands over here to crank is as I can't find my remote starter. If I understand correctly the ECU grounds the pump to make it run? If that's the case should I always have power at the pump with the key on? The car runs on starting fluid so the ignition is working fine. Here's the rest of the story,(and yeah I feel stupid about this part). In my haste to button everything up I accidently plugged the 12 pin plug onto the relay board incorrectly. I plugged it in 1 pin off. Imagine if the #1 and 2 pins were plugged into 3 & 4 instead. I corrected that but just hope I didn't smoke something in the mean time. My dad also hooked the positive wire up to the negative side of the coil. ....That was good for a new set of points. Any input would be greatly appreciated. I have the diagram of the relay board that was posted in another thread. |
Bartlett 914 |
Aug 31 2014, 01:34 PM
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#2
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Advanced Member Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
The fuel pump will only run for a few seconds after turning the key. Once the car starts, the pump will run continuously
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914bub |
Aug 31 2014, 01:39 PM
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#3
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Member Group: Members Posts: 433 Joined: 16-August 13 From: Modesto CA. Member No.: 16,260 Region Association: None |
The fuel pump will only run for a few seconds after turning the key. Once the car starts, the pump will run continuously Thanks. Is the ECU in fact grounding the pump as opposed to it energizing the fuel pump relay? I've also been told that every car, (no matter the make), that has D jet injection uses the same ecu? Do you know if that's true? I have an ECU out of a D jet injected 72 Volvo. I haven't checked any part numbers yet. Thanks for the input. |
bdstone914 |
Aug 31 2014, 01:57 PM
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#4
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bdstone914 Group: Members Posts: 4,520 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
The fuel pump will only run for a few seconds after turning the key. Once the car starts, the pump will run continuously Thanks. Is the ECU in fact grounding the pump as opposed to it energizing the fuel pump relay? I've also been told that every car, (no matter the make), that has D jet injection uses the same ecu? Do you know if that's true? I have an ECU out of a D jet injected 72 Volvo. I haven't checked any part numbers yet. Thanks for the input. Not all d jet cars do not use the same ecu. Pull the fuel pump relay. Turn the ignition on. Plug in the fuel pump relay. You should hear it click. If you have power and no click the relay could be bad. Pull the cover off the relay. Plug in relay and push down on the points. The fuel pump should run briefly. Swap it with a headlight relay which is behind the plastic cover in the front trunk. Try the fuel pump relay in the headlight. Check the fuse on the relay board for the fuel pump. Clean the fuse contacts. If you plugged on the 12 pin connector one pin off and turned on the ignition you would typically fry the coil wire. If it runs on starter fluid it is probably ok. |
914bub |
Aug 31 2014, 02:24 PM
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#5
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Member Group: Members Posts: 433 Joined: 16-August 13 From: Modesto CA. Member No.: 16,260 Region Association: None |
The fuel pump will only run for a few seconds after turning the key. Once the car starts, the pump will run continuously Thanks. Is the ECU in fact grounding the pump as opposed to it energizing the fuel pump relay? I've also been told that every car, (no matter the make), that has D jet injection uses the same ecu? Do you know if that's true? I have an ECU out of a D jet injected 72 Volvo. I haven't checked any part numbers yet. Thanks for the input. Not all d jet cars do not use the same ecu. Pull the fuel pump relay. Turn the ignition on. Plug in the fuel pump relay. You should hear it click. If you have power and no click the relay could be bad. Pull the cover off the relay. Plug in relay and push down on the points. The fuel pump should run briefly. Swap it with a headlight relay which is behind the plastic cover in the front trunk. Try the fuel pump relay in the headlight. Check the fuse on the relay board for the fuel pump. Clean the fuse contacts. If you plugged on the 12 pin connector one pin off and turned on the ignition you would typically fry the coil wire. If it runs on starter fluid it is probably ok. I did fry to coil wire,just haven't replaced it yet. When I close the contacts manually on the relay I still get no fuel pump. If I could determine weather the ecu supplied ground or fired up the fuel pump relay I could at least know which I should have full time at the pump. Right now I think I have neither. Thanks for the ecu info. Good to know. |
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