Hey everyone. I recently got my Dad's '72 Midget (the one with all the switches and buttons) running after sitting for a few years. When I originally parked it it had a running issue that I didn't have time to delve into. I got it running again, and other than a high idle, it runs great even after sitting for a few years. Thread here:
https://www.britishcarforum.com/bcforum/ubbthreads.php/topics/821527/1
The running issue is back, but only on the highway. Sometimes it runs fine, but then usually after a while the power drops off and it sounds like it's only running on 2 cylinders. It also seems to start to happen when going up hill. My first thought is debris in one of the carbs or float, but that would mean that it somehow got past the fuel filter. My other thought is debris in the tank obstructing full fuel flow into the pump / line. The pump sounds strong and runs continuously.
I've tried to duplicate it off the highway by running high RPM's in second or third gear and have had no luck, which stumps me. If it was strictly a fuel flow issue, then wouldn't I be able to duplicate it at slower speed, but similar RPMs. The load on the engine is less, but the fuel flow is similar to a highway situation.
Edit: New Sport Coil, electronic ignition, and spark plugs were installed when I got it running.
Any collective wisdom you guys can pass on would be much appreciated. I just don't want to go down an unnecessary path in the troubleshooting process. Thanks in advance.
https://www.britishcarforum.com/bcforum/ubbthreads.php/topics/821527/1
The running issue is back, but only on the highway. Sometimes it runs fine, but then usually after a while the power drops off and it sounds like it's only running on 2 cylinders. It also seems to start to happen when going up hill. My first thought is debris in one of the carbs or float, but that would mean that it somehow got past the fuel filter. My other thought is debris in the tank obstructing full fuel flow into the pump / line. The pump sounds strong and runs continuously.
I've tried to duplicate it off the highway by running high RPM's in second or third gear and have had no luck, which stumps me. If it was strictly a fuel flow issue, then wouldn't I be able to duplicate it at slower speed, but similar RPMs. The load on the engine is less, but the fuel flow is similar to a highway situation.
Edit: New Sport Coil, electronic ignition, and spark plugs were installed when I got it running.
Any collective wisdom you guys can pass on would be much appreciated. I just don't want to go down an unnecessary path in the troubleshooting process. Thanks in advance.