SteveBones
Jedi Trainee
Offline
Rebuilt my SU's about six months ago on my '58 TR3A. The rebuild included new throttle shafts. Having an issue after using the throttle. The engine will idle at about 500 rpm or more higher. So does not return back to the 900 RPM level. I disconnected the throttle linkage to the carbs, disconnected the link between carbs, and still have the high RPM problem. I can "lift" or pull back the the throttle shaft arm on the right carb and the idle will return to 900 RPM which is what I am looking for.
My plan is to pull off the carbs and check the fitting and placement of the butterfly valve. I am thinking the issue is with the fit being off. Please note the throttle shaft on the carb body was not reamed. My understanding is that if there is a gap, the idle will vary. This is not the issue I am dealing with. The issue is with a higher RPM. The RPM does stay constant. Just does not return back to the 900 RPM but rather stays at about 1400 RPM or slightly higher.
Any recommendations on what to look for to resolve is much appreciated.
My plan is to pull off the carbs and check the fitting and placement of the butterfly valve. I am thinking the issue is with the fit being off. Please note the throttle shaft on the carb body was not reamed. My understanding is that if there is a gap, the idle will vary. This is not the issue I am dealing with. The issue is with a higher RPM. The RPM does stay constant. Just does not return back to the 900 RPM but rather stays at about 1400 RPM or slightly higher.
Any recommendations on what to look for to resolve is much appreciated.