Posted this in the 80 forum but thought possibly I’d get more experience here since most people with 80s are fuel injected.
I have a sticky throttle on a carburated 1FZ-F. Symptoms are as follows:
- starting the car after it’s been sitting for a while has correct idle at around 700rpm.
- driving the car, the idle will stay at around 1,100 or so. pulling on the pedal will SOMETIMES help, but mostly it won’t go below 1,000. Clutching in will make the rpms tick up.
- if I try driving the car on WOT, the throttle will REALLY stick - clutching in will rev very high.
- with time it’ll sort of return but never below 1,100.
What I’ve done:
- carb is brand new (replaced a while ago)
- throttle cable and accelerator pedal and hand throttle replaced
- tried running without a throttle cable attached - carb returns to normal idle. pushing the throttle by hand revs the engine but returns to correct idle
- reconnecting the throttle cable makes it lazy again
Would anyone happen to have any advice? Could it be one of the round vacuum things around the carb? I haven’t replaced them, could they be going bad? It almost feels like there’s just not enough pull on the throttle cable to release it - and I’m guessing the pull-back is done using the carb’s throttle cable AND vacuum?
I have a sticky throttle on a carburated 1FZ-F. Symptoms are as follows:
- starting the car after it’s been sitting for a while has correct idle at around 700rpm.
- driving the car, the idle will stay at around 1,100 or so. pulling on the pedal will SOMETIMES help, but mostly it won’t go below 1,000. Clutching in will make the rpms tick up.
- if I try driving the car on WOT, the throttle will REALLY stick - clutching in will rev very high.
- with time it’ll sort of return but never below 1,100.
What I’ve done:
- carb is brand new (replaced a while ago)
- throttle cable and accelerator pedal and hand throttle replaced
- tried running without a throttle cable attached - carb returns to normal idle. pushing the throttle by hand revs the engine but returns to correct idle
- reconnecting the throttle cable makes it lazy again
Would anyone happen to have any advice? Could it be one of the round vacuum things around the carb? I haven’t replaced them, could they be going bad? It almost feels like there’s just not enough pull on the throttle cable to release it - and I’m guessing the pull-back is done using the carb’s throttle cable AND vacuum?