1983 toyota Tercel Revs up and down at idle

[quote:434147f5d9="kusuriya"]I managed to get an 83 toyota tercel 5 door, and i am stumped by a problem we uncovered. at first the idle was set high and untill the engine would warm up unless you kept down on the gas it would idle for a few and die. once the engine heated up it would idle high, but stay there. we re-ajusted the idle according to the factory but now on start it revs up and down and i am stumped. Im not incredibly inclined with this kind of mechanical genius, and the few friends i have that have any inclination are stuck. soo im just kinda asking for someone to point me in a direction to start looking, because there is no smokeing and all the vacum lines look brand new.[/quote:434147f5d9]

Clean out the throttle body/plate and the IACV.

[quote:05d9ce52b1="rasmataz"][quote:05d9ce52b1="kusuriya"]I managed to get an 83 toyota tercel 5 door, and i am stumped by a problem we uncovered. at first the idle was set high and untill the engine would warm up unless you kept down on the gas it would idle for a few and die. once the engine heated up it would idle high, but stay there. we re-ajusted the idle according to the factory but now on start it revs up and down and i am stumped. Im not incredibly inclined with this kind of mechanical genius, and the few friends i have that have any inclination are stuck. soo im just kinda asking for someone to point me in a direction to start looking, because there is no smokeing and all the vacum lines look brand new.[/quote:05d9ce52b1]

Clean out the throttle body/plate and the IACV.[/quote:05d9ce52b1]

sorry im a little green whats the IACV?

[quote:7f5f2c6c09="kusuriya"][quote:7f5f2c6c09="rasmataz"][quote:7f5f2c6c09="kusuriya"]I managed to get an 83 toyota tercel 5 door, and i am stumped by a problem we uncovered. at first the idle was set high and untill the engine would warm up unless you kept down on the gas it would idle for a few and die. once the engine heated up it would idle high, but stay there. we re-ajusted the idle according to the factory but now on start it revs up and down and i am stumped. Im not incredibly inclined with this kind of mechanical genius, and the few friends i have that have any inclination are stuck. soo im just kinda asking for someone to point me in a direction to start looking, because there is no smokeing and all the vacum lines look brand new.[/quote:7f5f2c6c09]

Clean out the throttle body/plate and the IACV.[/quote:7f5f2c6c09]

sorry im a little green whats the IACV?[/quote:7f5f2c6c09]

IACV= Idle Air Control Valve

I did that, and nothing, I checked the bolts on the carb and they were a little loose soo i replaced the base gasket, and that helped a little bit, but now while the engine is cold it is fine, as it warms up it gets a little worse and worse and the only adjustments that help it make the engine idle high.

Lets try this-spray some carb cleaner on the carb choke plate-adjust it for initial opening and the fast idle cam @ 2nd highest spot @ 1200rpm.