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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Java2570 |
Jun 16 2019, 07:41 AM
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#2
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Senior Member Group: Members Posts: 649 Joined: 7-May 11 From: Fishers, IN Member No.: 13,035 Region Association: Upper MidWest |
I had an instance a few years back where I was out driving and my engine would randomly cut out and it eventually stopped running on me. Luckily was able to get it restarted and almost home when it died completely. I called my brother and we got it pushed the few blocks back to my house where it dawned on me to double check the fuel pump fuse on the relay board. It was vibrating loose randomly and had come unseated
enough to shut down fuel and stop the engine. Not sure it's what you have going on or not but you don't mention checking your relay board so give it a look and make sure nothing is suspect there. I've also had weird missing/cutting out because I had a bad connection on my CHT sensor..... Also, if you haven't already, check that the harness ground connectors are secure on the 3 terminal connector on the engine block. |
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