Random missfire/shutdown - need help!
Thread Starter
Teching In
Joined: Aug 2016
Posts: 6
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Random missfire/shutdown - need help! Hi!
After winter storage, I finally got my car out for a ride today.
It is a 65 Impala with a 5,3L/4l60e from a 2003 Tahoe. I did the swap last year, and drove a lot last summer without having any problems.
But today a weired problem occurred; when driving downhills for a while the engine starts to missfire and randomly stops! As soon as I put it in neutral or park, it fires straight up again. When driving up hills with part,or wide open throttle it runs perfect! Also when idling not driving.
The only difference from last summer is a cruise control switch that I mounted this winter, and I also made myself a gear range indicator on the dash. I've hooked onto the Transmission output selector A, B,C to encode the relay setup. This works very well.
The question is could this disturb anything that occurs missfire/shutdown?
Please let me know if you have any ideas..,!!
After winter storage, I finally got my car out for a ride today.
It is a 65 Impala with a 5,3L/4l60e from a 2003 Tahoe. I did the swap last year, and drove a lot last summer without having any problems.
But today a weired problem occurred; when driving downhills for a while the engine starts to missfire and randomly stops! As soon as I put it in neutral or park, it fires straight up again. When driving up hills with part,or wide open throttle it runs perfect! Also when idling not driving.
The only difference from last summer is a cruise control switch that I mounted this winter, and I also made myself a gear range indicator on the dash. I've hooked onto the Transmission output selector A, B,C to encode the relay setup. This works very well.
The question is could this disturb anything that occurs missfire/shutdown?
Please let me know if you have any ideas..,!!
