500 rpm fluctuation....please help!!

93ludeSi · Post by **93ludeSi** » February 09, 2008

fill it up with some 93 octane and put a bottle of ISOfreeze or even some fuel injector cleaner...

fabricator · Post by **fabricator** » February 09, 2008

Which car/motor is this? if its the LS swapped CX read below.

Fast Idle Thermo Valve! this would be where i would start....it is located on the bottom of the throttle body. there will be a metal cover with 2 screws securing it....remove the cover and you will see the valve if you can wiggle the valve or it is backed out to the plate take a largre flat head screwdrive and screw it back in....i see this all the time. this is a quick check, if that is okay then check your IAC valve and troubleshhot from there. hope this points you in the right direction.

If it is the CX Stocker start at the IAC....in this case honda troubleshooting always starts with the IAC.

93ludeSi · Post by **93ludeSi** » February 10, 2008

any update?

Teaks92HB · Post by **Teaks92HB** » February 11, 2008

well i believe it was a fuel issue... kinda weird but not really doing it now.. so i filled up with midgrade and off i went..

thanks for all the help

Post by **tenchu** » February 12, 2008

I bet you its your IAC like a couple peeps said, i've had that problem a couple times always IAC. Only exception is my damn CRX did that yesterday for like 10 sec till i turned it off and back on again. Fucking old cars.

Teaks92HB · Post by **Teaks92HB** » February 12, 2008

haha it sucks dude hard. lol i just wanna put a 1.8 in it be done