idle problems.

[240sxcl50]

I have a problem with my idle being that it is to low.Its only low if my a/c button isnt pushed in no a/c or if the defroster button isnt in. The idle isnt like 200 rpm but it is about 7 and the car shakes need some thoughts.

[chaosli]

check you iav

[costa_rican13]

^^^^ditto but its IACV. and also i reccomend checking your MAF(mass air flow sensor) is connected on the intake piping. if your problem is still not solved then i say replacing all the gaskets for the entire intake manifold. it will take you a good 4-5 hrs, depending on experience and knowledge of cars, also variety of tools you have as well. this should give you the correct idle if all this is done properly.

[240sxcl50]

ok. but uhh what is a IACV

[costa_rican13]

its the IDLE AIR CONTROL VALVE. the 2nd biggest hose on your intake piping that goes under and inside the middle of the intake manifold goes to it. there is a screw in the back of the intake manifold on the side of the passenger. unscrew it(raise idle) screw it in farther(lower idle)

[vancouverbc]

^^^^ditto but its IACV. and also i reccomend checking your MAF(mass air flow sensor) is connected on the intake piping. if your problem is still not solved then i say replacing all the gaskets for the entire intake manifold. it will take you a good 4-5 hrs, depending on experience and knowledge of cars, also variety of tools you have as well. this should give you the correct idle if all this is done properly.

he has a low idle not a high idle

[s14danny]

compression check?

[vancouverbc]

I have a problem with my idle being that it is to low.Its only low if my a/c button isnt pushed in no a/c or if the defroster button isnt in. The idle isnt like 200 rpm but it is about 7 and the car shakes need some thoughts.

sounds weird. i guess the aac valve could be blocked and you have the idle adjustment screw in all the way and the throttle plate is binding. the ficd valve opens when a/c is on which lets extra air in. the ficd and aac and fixed idle hole are all part of the iacv.

[vancouverbc]

compression check?

it idles ok with ficd open