The story is:

1. Start up the engine.
2. Till warm up, ran around 20m and stop.
3. The idle suddenly go to 500rpm. Sometimes engine off. (i need to keep to step the accelarator)
4. I step on the accelerator and keep going.
5. Driving around 2-3 mins and stop the car. Nice idle. No problem at all.
6. I switch on the air-cond. The idle is very rough. Between 600rpm-1600rpm.
7. I switch off the air-cond. The idle becomes normal.

I cleaned the IACV and throttle body. No cel on. I checked the spark plug. They are normal. I am very confusing. Anyone can help?

 

Also, where is FITV?








Modified by Edward at 4:50 AM 1/13/2006

 

timing?
fuel pump?
fuel filter?
dizzy?
dizzy internals?
spark plug wires?
bad ground?
shitty battery?
bad alternator?

 

timing? At 18 degree. (I am using 100 octane petrol)
fuel pump? ( 100% working )
fuel filter? ( changed 1 month )
dizzy? ( what is this )
dizzy internals? ( what is this )
spark plug wires? ( 100% working )
bad ground? ( not sure, should be alright )
shitty battery? ( 100% working )
bad alternator? ( not sure )

I heard some peole have same situation. He said: it is a FITV problem. But i don't know the position for my ITR. Anyone have suggestions?
Thanks

 

you don't have a FITV, usually obd1 cars had them. It would be right under the TB where those two hoses are. What is done to the car? do you have cams in the car? You can try upping the idle, by adjusting the idle screw, but if this problem just occuredd randomly one day then there is most likely something else going on. Are you sure the IACV is working?

 

How can i know the iACV working or not?

 

I cleaned again. The problem is still here. How can i do?

 

Dizzy = American slang for "distributor"

Edward, try adjusting the throttle cable?

 

What have you recently done to the car? Taken the IM off? Messed with any of the vacuum hoses? I want to say IACV related.

Have you changed your coolant recently? Maybe bleed the coolant system again.

 

Timing belt could be loose. This caused my car to have a low and sometimes odd idle.

 

Sounds like a IACV prob. Mine had a similar prob after car sat 2 months. I would start there.

 

I cleaned the IACV with carby cleaner yesterday. The problem is still here. How can i do?