'74 1.8L LJet/fuel pump, Fuel Pump not staying on |
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'74 1.8L LJet/fuel pump, Fuel Pump not staying on |
RKramden |
Jan 20 2020, 02:17 PM
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#1
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Newbie Group: Members Posts: 41 Joined: 26-October 19 From: So. California Member No.: 23,589 Region Association: Southern California |
This is my first time starting a topic, I don't know if I am even typing in the correct location, but I am having an issue with my '74 LJet and fuel pump. The pump starts with the ignition switch, Pump also runs when Air sensor arm is manually moved. However when starting, it seems that the air sensor is somehow cutting off the fuel pump circuit. The PO had bent the arm so it never opened, but I have bent it back to move as designed. If I disconnect the electrical plug to the Air Sensor, the car starts and runs fine......any thoughts? BTW I have replaced the dual relay, but that did not fix the problem.
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Rob-O |
Jan 24 2020, 09:57 PM
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#2
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Senior Member Group: Members Posts: 1,251 Joined: 5-December 03 From: Mansfield, TX Member No.: 1,419 Region Association: Southwest Region |
I will check ohms on AFM this weekend. If they don't check out, off to Pelican for a rebuild. If they do check out does that mean it's good or could there still be an issue with the signal when running? If it is good am I down to the ECU?...ouch! The ECUs rarely fail. It is either the L-Jet harness or the AFM. Maybe someone close to you has one you can use for testing. I recently sold one to @Rob-O . He was having drivability issues, and the replacement AFM fixed it. Absolutely helped clear up some serious drivability issues. |
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