My FI Frustrations Continue, Still have engine cutting out |
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My FI Frustrations Continue, Still have engine cutting out |
dralf |
Jun 15 2019, 01:26 PM
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#1
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Member Group: Members Posts: 230 Joined: 24-January 04 From: Dayton, Oh Member No.: 1,597 |
I keep purchasing components for my 1975 D Jet system but to no avail in solving the mystery of why it will sometimes cut out when the reves are about 2500 and the engine is under load. For those who have read my earlier posts, I now have new wiring harness, coil, points, condenser, cleaned the dizzy, new Auxiliary Air Valve, and cleaned all wire connections. Also replaced the fuel filter. My recent purchase was a new MPS for mine had a diaphragm leak. I drove around the block and was happy for the first lap since my adjusting the valves and timing seemed to improve acceleration. Unfortunately by my second lap the engine started to randomly cut out as it have before. My path forward is to replace the vacuum advance diaphragm on the dizzy which I found a leak. also to check the cylinder head temperature sensor, and the throttle position sensor. I there anything else I should be checking or replacing ? I am thinking about setting up my timing light inside the cabin so I can verify that during those times where the engine cuts out the spark plugs are still getting power. I hate to think my ECU is bad. Also where or who can check that out if it comes to that ?
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TX914 |
Jun 18 2019, 06:48 AM
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#2
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Alan-B Group: Members Posts: 168 Joined: 27-July 14 From: USA Member No.: 17,689 Region Association: None |
Dralf, I once had a similar symptom with my 76 where it would cut out intermittently under load with revs between 2000 and 2500. A P mechanic at the time diagnosed the problem by disconnecting and grounding the CHT sensor lead (engine warm) and it ran fine, so we replaced the CHT sensor and that solved the problem.
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