two weekends ago:
installed crvtec and converted 89crxsi to obd1
had some high (2.5k) idle issues to begin with, but did some things (moved o2 to back of dp and fixed some vacuum lines) problem went away
<U>tuesday-sunday:</U>
car idled great. it was everything i dreamed of.
<U>monday-wed:</U>
car was back to a high (2k) idling
<U>last night:</U>
replaced all vacuum lines, did some sensor tests but there is still a couple of things i need to check for (short between tps-ecu and iacv-ecu), tried cleaning the iacv
<U>this morning:</U>
car still idling high (2k) but now my idle is flunctuating and at a stop sign the car actually died and would not start for like 3 min. *pulling hair out* finally started, drove it home then took truck to work.

i am going out of my mind trying to figure this out. i am getting to the point where i am just going to replace all the sensors. what else do i need to do? fyi, the entire top end except for internals (cams, retainers, v springs) is from a 1g (89) b16. also, i have disconnected the fast idle thermo valve too (it made no difference either way).

the one thing that stands out in my mind as a potential prob is when i put my finger over the lower port in the throttle body, the car idles where is should (about 800).

the car has ran great the whole time except for this idle.

EDIT: sp


[Modified by Jeff C, 8:24 AM 9/26/2002]

 

ttt
come on now somebody can help me.
am i making it too confusing?

 

What happens when you reset the ECU?

 

ill try it tonight.
do you just pull the hazard's fuse for 10 seconds in order to reset the ecu?

 

yah... or unplug the ecu... Its probably the IAC Valve, or a vaccuum leak... To check for a vaccuum leak, grab carb cleaner, and spray it all over the place... if the car bogs and stalls, thats where your vaccuum leak is...

If the Idle screw is set too far in or too far out, it can cause this too...

 

i am leaning toward the iacv because like i said previously....
the one thing that stands out in my mind as a potential prob is when i put my finger over the lower port in the throttle body, the car idles where is should (about 800).
that little hole is sucking a lot of air and i am not sure if it should be or not, but that port has something to do with the iacv

i have srewed the idle screw in and out but that dosent help with my prob. right now it is all the way in though.

 

The IAC valve shouldn't be sucking that much air. Try pulling it off and hosing it out with some cleaner. Sometimes they get gummed up.

 

I think you just answered your own question... you have a hole open to atmosphere that you can cover up and the idle goes down? or is it when you take the vaccuum line off and put your finger over the hole?

 

i found it. you are right, i answered my own question. the lower port in the tb was sucking a lot of air and i just had to find out where it was going. as far as the iacv being involved, that was wrong. the upper port (not sucking air) in the tb is associated with the iacv. the lower port (sucking hella air) in the tb is associated with the fast idle thermo valve (just under the tb) which i thought i had bypassed. come to find out, the valve inside it was WIDE OPEN so air was runnin through it like mad crazy. all did was take it appart, screw the valve closed and put it all together. then adjusted the idle with the idle screw and i purrs like a kitten. i will just have to help it along with the warmup process in the mornings.

thanks for the replies guys.