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TRspitfirefan
Member
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Working on a 65 TR-4 with several issues.
The car seems to run pretty good when cold, however once the engine warms up, it will not run well and will sometimes stall. When this happens, the car will not restart until the engine cools off some. Also the engine diesels/runs on after shutting off the ignition with the engine warm.
The engine seems to maybe run just a little warm at times, though it never really overheats.
Initially, I suspected a faulty fuel pump or a vapor lock issues in the fuel line. However, after replacing the pump and rerouting the line to the carbs, the problem still persists.
Despite not noticing any clear overheating issues, I began to wonder if the cooling system is circulating properly. Perhaps this is causing hot spots in the cylinder head that could be contributing to the dieseling as well as the running issues at warmer temps? Also while running the engine with a coolant pressure gauge installed, I noticed strangely fluctuating coolant system pressure, which usually indicates combustion gases leaking into the cooling system. I checked to make certain that the radiator was flowing sufficiently and also checked that the water pump impeller fins are intact.
So here's my Question. Am I on the right track, or am I looking completely in the wrong direction?
Has anyone had similar issues before?
I'm just getting back to working on the car, after it sat all winter.
Any suggestions would be greatly appreciated.
The car seems to run pretty good when cold, however once the engine warms up, it will not run well and will sometimes stall. When this happens, the car will not restart until the engine cools off some. Also the engine diesels/runs on after shutting off the ignition with the engine warm.
The engine seems to maybe run just a little warm at times, though it never really overheats.
Initially, I suspected a faulty fuel pump or a vapor lock issues in the fuel line. However, after replacing the pump and rerouting the line to the carbs, the problem still persists.
Despite not noticing any clear overheating issues, I began to wonder if the cooling system is circulating properly. Perhaps this is causing hot spots in the cylinder head that could be contributing to the dieseling as well as the running issues at warmer temps? Also while running the engine with a coolant pressure gauge installed, I noticed strangely fluctuating coolant system pressure, which usually indicates combustion gases leaking into the cooling system. I checked to make certain that the radiator was flowing sufficiently and also checked that the water pump impeller fins are intact.
So here's my Question. Am I on the right track, or am I looking completely in the wrong direction?
Has anyone had similar issues before?
I'm just getting back to working on the car, after it sat all winter.
Any suggestions would be greatly appreciated.
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