 Fuel pump quit working |
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| watsonrx13 |
 Mar 11 2006, 08:18 PM
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#1
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Advanced Member  Group: Members Posts: 2,734 Joined: 18-February 03 From: Plant City, FL Member No.: 312 Region Association: South East States  |
OK, I have been having a problem with the engine overheating and decided to change the idle jets from 50s to 55s. After I changed the jets, the fuel pump quit working. BTW, I have dual weber IDF 40s, with the fuel pump mounted underneath the fuel tank. I have a fuel filter between the fuel tank and pump, with another filter between the fuel pump and the carbs in the engine compartment.
It appears that there is no power to the fuel pump, which I spliced into the engine compartment at the original fuel pump line, then ran the new wires through the center tunnel to the front. I need to verify that there is power to the pump, how do I check the electrical connections in the relay box? Any other recommendations are requested. I'm also planning to check and/or replace the two fuel filters and maybe the fuel sock in the tank. -- Rob |
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| SirAndy |
Mar 11 2006, 09:24 PM
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#2
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Resident German Group: Admin Posts: 41,633 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
if the PO used the original pump wiring, simply use the haynes manual to trace the current. start with the pump relay and fuse on the relay board, then go from there ... can you post a pic of your relay board? i'd like to see how they wired the circuit to run the pump all the time (which was previously controlled by the FI-Brain) ... (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif) Andy |
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| URY914 |
Mar 11 2006, 09:25 PM
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#3
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,544 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
Rob,
Did this just happen this afternoon? You can't hear the pump hummming? |
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| watsonrx13 |
Mar 11 2006, 09:50 PM
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#4
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Advanced Member Group: Members Posts: 2,734 Joined: 18-February 03 From: Plant City, FL Member No.: 312 Region Association: South East States |
Yea it happened today. I don't have a pic available, but can take one tomorrow.
-- Rob |
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| URY914 |
Mar 11 2006, 09:54 PM
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#5
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,544 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
I'd run a jumper wire stright from a hot circuit or the battery to test the pump.
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| Joe Ricard |
Mar 12 2006, 07:26 PM
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#6
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Well, I would.......
Stick a meter lead into where you spliced the wire. 12V = good move your focus to the pump 0V = bad go back to the source start with relay From there on you will be over your head no offense. |
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