Why does my 3dr idle at around 1300-1400 rpm?
thanx in advance

 

Remove your foot from the pedal

 

Your idle is set to high

 

Yes reduce your idle sped to about 1k
then it will idle at about 1k
hope this helps

 

Have you done anything to the engine or has it just started to happen....?

An engine can idle faster hunting for more fuel on tick over especially when a filter has been assed for example where the Co would need adjusting then the idle can be turned down on the idle screw.

Si

 

a small air leak on the vaccum side of the butterfly,idle speed control valve faulty/dirty
idle speed set incorrectly,leaking diaphram on a dump valve,throttle not fully closed at idle,incorrect fueling, but to name a few

 

The thing is guys, when the car is cold it idles at 1k but when it get up to full operating temperature the idle rises to 13-1400 rpm I've checked for air leaks and all seems fine.

 

Thanks for that Chris, very usefull

 

Water temp sensor, ISCV could be faulty or badly wired.

Mike should have a space ISCV of mine you can try.

Does disconnecting the ISCV when she's warm make a difference ? Revs should drop to base idle.

 

Ricky,
Let's start by assuming you've got no leaks,, (as you say you've checked )
Disconnect the idle valve and see if the idle drops - if it doesn't, remove the valve and seal off the hole in the throttle body with something appropriate. If idle drops now, then the valve is stuck open, if not then try and adjust the base idle setting with the bypass screw on the bottom of the throttle body.
If you can't adjust it down to 850-900rpm, then you HAVE got a leak somewhere between the throttle body and head.

 

I have'nt tried that yet, i'll give it a go tomorrow

 

Ricky, gimme a shout if you need a hand or something.

If she was idling fine before, it's either a leak or a sensor/iscv in my opinion.

The idle screw doesn't move on its own, I wouldn't touch it unless you are 100% sure everything else.

Seems logical to me, but I might be missing something

 

i was gonna say the blue water temp sender .. as i had the same type of thing on mine..changed it and went back to normal

 

Oh, and I have one you can borrow to try if you want. But it would be best to check this at the ECU when car is cold and warm, cos taking them out is a fidldy job ( + you have to empty coolant IIRC).

 

Make sure your throttle cable isnt too tight and adjusted for "Max Power"

 

Thanks for the replies guys it turned out that the butterfly was sticking open a little too much