Hot Running/Starting Issues

[andig]

Originally Posted by ERA174

Looks like an issue with your carburetor running rich. First thing, if you have a choke make sure it is fully opening when the engine is at full operating temp. If the choke is not the problem, the carburetor is either not jetted properly or is not functioning properly. If you are not up to diagnosing the issue, bring it to someone who can diagnose and correct the issue. Driving the car while it is running excessively rich will damage the engine.

ERA174 - thanks. There is no choke on the car but yes, it could be running rich and the carb will be checked out at the garage tomorrow. I just thought it odd that the car ran perfectly when cold to warm, i.e the first 15/20 mins of stop start and highway running and then the problems began.

[jhv48]

Sounds like vapor lock. Boiling fuel in the float bowls. Does the carb have a spacer between it and the intake manifold?
If you have a switch to turn on the radiator fan, (the one on the back side of the radiator) try leaving the fan on while driving in stop and go traffic and see if that helps.
Try the simple things first. Since it runs great until heat builds up, that should be the culprit. And with less than 1,000 miles in 4 years, my guess is the previous owner never drove it long enough for the problem to surface.

[andig]

Originally Posted by jhv48

Sounds like vapor lock. Boiling fuel in the float bowls. Does the carb have a spacer between it and the intake manifold?
If you have a switch to turn on the radiator fan, (the one on the back side of the radiator) try leaving the fan on while driving in stop and go traffic and see if that helps.
Try the simple things first. Since it runs great until heat builds up, that should be the culprit. And with less than 1,000 miles in 4 years, my guess is the previous owner never drove it long enough for the problem to surface.

Thanks and there isn’t a spacer so could be worth getting one. Also, removed the air cleaner and was surprised to see that two of the barrels were coated with carbon but two were clean - not sure if that points to anything in particular as the cause though.