so my co-worker's STOCK 95 civic Dx has a wierd idling problem.
the car osolates up and down kinda fast.
i do not know by how many RPM since it does not have a RPM gauge.

at first i thought it was the IACV, but the car only does this when it is warmed up and only when its in park on in neutral.

any1 know what the problem may be?

 

speed sensor? (vss)

 

Clean the FITV (and IACV) on the throttle body and also bleed the cooling system.

 

all the above and possibly a vaccume leak

 

where is the FITV?
i know that the IACV is located on the back of the intake mani.

also when re unplugs the Throttle body position sensor, it stops but it idles pretty high.
i would say 1,500-2,000

 

my car did the same thing but it was a vaccume leak. fitv is under the throttle plate.

 

how can i find a vacuum leak?
cuz i dont want to remove the FITV or IACV just to find out that that was not the problem.
have to try the easy stuff first

 

Either of you smoke? make sure the fan is off and put a cig around the vacuum lines. Check the vss though and the coolant

 

lol. nope. none of us smoke.
how will the VSS affect the idle though?

 

IDK how the vss affects it but it does. Mine is bad on my hatch and it makes it idle surge. Mine is a auto though

 

spray carb cleaner around your vaccume lines. if you car starts to choke out you found your leak

 

Check your antifreeze level. theres some sort of strip somewhere in side the engine and when the coolant gets low it revs funny.
Also have you tried resetting the ECU?

 

his is an automatic as well.
still dumbfounded on how the vss could cause this

ill try this after work when i have carb cleaner

to reset the ECU, you unplug the negative battery cable for 10 seconds right?

 

[quote=Unseen Racer;39190978]where is the FITV?
i know that the IACV is located on the back of the intake mani.

Click here.