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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DRPHIL914 |
Jun 15 2019, 03:56 PM
Post
#2
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Dr. Phil Group: Members Posts: 5,768 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
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 ? My bucking or cutting out I found was related to 2 things. 1. TPS board worn 2. Somehow the distributor- once I put the 123ignition distributor in it went away completely. - this eliminates the points on top and the FI points. If you haven’t checked the TPS, go there next and if you have, then it could still be something with distributor or points. My bet is the TPS- have not seen the other thread so if this has been done then NVM |
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