Fuel pump not running |
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Fuel pump not running |
Rand |
May 19 2019, 05:29 PM
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#1
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
75, 2.0, djet. Won't fire. Spark is good. A little starting fluid in the intake and it fires. Clearly a fuel problem. I'm not hearing the fuel pump. Shouldn't I hear it for a few seconds when first turning ignition on? I checked the fuse (#25 on the relay board) and it's good. I'll put a multimeter on the pump terminals to check for power next, but thought I'd throw this out there to the collective for any other input until I can get back to it. Grounds are also on the list. Or put power directly to the pump and see if it runs.
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dralf |
May 22 2019, 11:50 AM
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#2
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Member Group: Members Posts: 230 Joined: 24-January 04 From: Dayton, Oh Member No.: 1,597 |
This morning I wired the fuel pump directly to a battery and it works ! Good news there but then I checked the relay board fuses and found only the blue one (25 amp ? ) had power to it. The red one had no current on either side of the fuse holder. I was then under the impression that this was my problem, but when I look at a 1974 relay board wire diagram it appears that this may not even be connected to anything, thus no current would be measured. I plan to do some more studying tonight and testing tomorrow. At least the cost of a new pump may be eliminated from my repairs. Thanks again for all who have help point me in the direction to get this fixed.
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mtndawg |
May 22 2019, 12:38 PM
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#3
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Member Group: Members Posts: 414 Joined: 26-January 09 From: Granite Bay, Ca Member No.: 9,985 Region Association: None |
This morning I wired the fuel pump directly to a battery and it works ! Good news there but then I checked the relay board fuses and found only the blue one (25 amp ? ) had power to it. The red one had no current on either side of the fuse holder. I was then under the impression that this was my problem, but when I look at a 1974 relay board wire diagram it appears that this may not even be connected to anything, thus no current would be measured. I plan to do some more studying tonight and testing tomorrow. At least the cost of a new pump may be eliminated from my repairs. Thanks again for all who have help point me in the direction to get this fixed. The rear 25 amp fuse is the one that needs to have power for the fuel pump to work. |
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