i have a94 eg civic vti that wont idle properly it purges from 400 to 1100 rpm when idleing but drives fine but sometimes it idles fine but if you rev it it just purges again anyone any ideas thanks

 

your throttle cable might be catching on to something, also check your idle RPM screw. (the screw that changes your RPM's.)

 

THE CABLE IS FINE I HAVE 2.2 THROTTLE BODY ON IT BUT DOES THE SAME WITH STANDARD ONE HOW DO I CHECK/ADJUST THE SCREW

 

Fast Idle thermal valve.....i would check that first before messing with the idle screw.

 

COULD BE THE IDLE AIR HAVE U CHECKED THAT OR FOR VACUUM LEAKS?

 

HOW DO I CHECK FAST IDLE VALVE

 

it is located on the bottom of the throttle body. It will have a cover plate with 2 screws. take that plate off, and you'll see a plastic circle piece with a dome in the center. make sure tha piece is screwed all the way in. problem fixed.

 

https://honda-tech.com/zerothread?id=699787

 

Here it is for a GSR.. it looks the same way except for the intake mainfold design.
https://honda-tech.com/zerothread?id=1564019

 

i tried the fast idle valve and it calmed it down a bit but still surgeing anything else that could cause this

 

As others have said, IACV and/or vacuum leaks

 

theres no vacum leaks i have checked could someone tell me where the iacv is on the b16a2 plz

 

My mate a problem with his ECU on his delsol which caused the car to hunt for the revs. Have you have any warning lights recently so you gan grab a code? Might be worth doing a code check to see if it throws up anything

 

the iacv is on the back of the intake mani. it has two bolts holding it on and has two coolant lines, plus a electrical plug. real simple to take off and on.

 

Do you have a/c?

If you do, let the car idle and turn the a/c on. Did the idle rpm drop at all in relation to the a/c turning on? If it did, then it is most definately the idle air control valve. The problem that it is having is that it cannot keep up with the needs of the engine any more. It is old, dirty and possibly shorted.

 

i have no warning lights and the engine management light has only ever came on when you turn the ignition on so i dont think it will throw any codes but how do i check to see if theres any

 

i dont have a/c wat do i do with the iacv do i clean it or do i replace it

 

clean it first. use some brake cleaner, and get the carbon deposits out.

 

you said you changed it to a 2.2 throttle body. are you sure you put the body on correct with a new gasket. its a possiblity that you have a vacumm leak between the throttle body and the intake manifold