seems at a light my idle bounces from 750-250 sometimes... what could be the cause of the problem just had a tune up and valve adj. a couple of weeks ago..

curious if it could be the IACV ...TPS or the FIV

any help would be appreciated

 

clean the TB opening first.

 

tps and eacv usually flucuates higher than the idle speed. so i would say listen to the boe man clean the tb and get a new gasket.

 

thanks guys