MY 67 TR4A USED TO IDLE WARM AT 50 LBS. OIL PRESSURE. IT WAS A RECENT
PURCHASE, AND I SUSPECTED OLD GAS IN IT (MAYBE 10+ YEARS).
AFTER DILUTING IT HEAVILY WITH FRESH GAS AND GAS TREATMENT, IT RAN PRETTY
WELL, UNTIL I HIT THE LAST 1/8 TANK. THEN IT STARTED IDLING ON TWO
CYLINDERS. AT FIRST I SUSPECTED FOULED PLUGS, SO I REVED IT UP PRETTY HIGH
TO BURN OUT MOST OF THE GAS. THIS IS WHEN THE PRESSURE DROPPED TO 15 LBS.
AT HOT IDLE. AT 3000 RPM'S THE PRESSURE GETS BACK UP TO 50 LBS.
I CHANGED THE PLUGS AND CLEANED THE SEDIMENT BOWL. I ALSO CHANGED THE GAS
FILTER-YES MINE HAS ONE FROM THE PREVIOUS OWNER, JUST BEFORE THE CARBS.
THIS DID NOT FIX THE IDLING PROBLEM OR THE OIL PRESSURE. I FIGURED OUT THAT
ONE OF THE SPRINGS (RETURN) ON THE CARB CAME OFF. THIS WAS CAUSING TWO
CYLINDERS NOT TO RUN AT IDLE. I DID LET IT IDLE WHILE I WAS FINDING THE
PROBLEM.
QUESTION IS-IS MINE DEFINITELY AN ENGINE PROBLEM. WHEN I FIRST START IT THE
PRESSURE HITS 50 AND GOES DOWN AS IT WARM UP. COULD POLLUTED OIL BE THE
PROBLEM?
ANY IDEAS WOULD BE APPRECIATED. THANK YOU
JASON WEISLER
TRYING TO GET BACK ON THE ROAD
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