Geo Hahn
Yoda
Offline
On a TR4 with Strombergs -- I get a stumble coming off idle at a stop light. The engine quickly recovers but it is annoying.
I have checked the mixture by the usual methods (lift-the-pin, Colortune, read the plugs) and it seems fine.
Have tried both thick (20w50) and thin (Marvel Mystery Oil) oil in the carbs -- problem recurs.
The diaphragms look fine (stretched while examining in front of strong light).
Pistons raise fine and drop cleanly.
The problem seems to only occur once the engine is hot. Also, the longer I sit at the light the worse the stumble is when I start to move.
I have not yet examined float level -- could that be it?
The rest of the time the engine performs fine -- but not looking forward to the long hot summer with this going on.
Thanks for any advice.
I have checked the mixture by the usual methods (lift-the-pin, Colortune, read the plugs) and it seems fine.
Have tried both thick (20w50) and thin (Marvel Mystery Oil) oil in the carbs -- problem recurs.
The diaphragms look fine (stretched while examining in front of strong light).
Pistons raise fine and drop cleanly.
The problem seems to only occur once the engine is hot. Also, the longer I sit at the light the worse the stumble is when I start to move.
I have not yet examined float level -- could that be it?
The rest of the time the engine performs fine -- but not looking forward to the long hot summer with this going on.
Thanks for any advice.