1993 civic idle issue

[Firstgentoyota]

Runs good, idles up and down at idle, when driving idle is fine only when sitting. I have changed all sensors still have the problem any help would be huge. Thanks

 

[91EF01]

Try replacing the ICM


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[5SpeedEJ6]

I have changed all sensors

What sensors are you talking about specifically? I doubt you've changed ALL sensors in the car, that would insanely time consuming and not very smart anyways. Whenever I heard an idle issue I tend to lean towards a vacuum leak, have you checked for that?

 

[Restotech]

Idle going up and down is usually the iacv (idle air control valve) but can also be a vaccum leak or fast idle thermo valve. There are some other possibilities but these are the most common.

 

[Firstgentoyota]

Ive changed the idle air control valve ive gone over all the vacume lines aswell nothing changed or helped at all.

 

[Restotech]

Check the fast idle thermo valve. Google it. There's good info on it.

 

[Mr.Baker]

Do you hear a whistling sound under acceleration?
Intake manifold gasket could cause idle issues.

 

[CamdSingleSlam]

or an 02 sensor, do you have a CEL?

 

[Motoammo]

Runs good, idles up and down at idle, when driving idle is fine only when sitting. I have changed all sensors still have the problem any help would be huge. Thanks

I went threw this same thing do me a favor and take your radiator cap off and start the car