just did a spark plug change and and an oil change. now my car idles weird.
at a stop rps raises to 1.5k then drops to just under 1k. then repeats the weird idle over and over. the thing is that it doesn't do it all the time.
spark plugs maybe?

 

idle air control valve (IACV) or fast idle thermo valve (FITV) look in the stickys on how to clean them

 

yup that is correct!

 

My DA had Same problem try bleeding the radiator of air tht messes with iacv and causes It to fluctuate

 

before you try to clean your iacv check if your spark plugs are gapped right and what kind are they? also check if they are loose in the head. did you knock anything loose while you were doing your oil change. check for a vacuum leak at the master cylinder i remember i knocked mine loose by accident before.



just because the iacv problem happens to a lot of people doesnt mean that it happens to everyone. most of the time when people come on here with the same problem as you its usually not the iacv people just try to act smart sometimes and throw out "ohh its the iacv because it happened to me" check if any hoses are loose or like i said check if the spark plugs are gapped correctly