Hey i got a 93 civic coup ex with 190k miles. Its all stock and runs good. Only when I start it the rpm's jump from like .8k to like 2.5k untill it warms up. I cleaned this one thing in the back of the intake manifold and it helped but still does it now. When the car stands over a cold night, it is worse.

THANX

Anything helps

 

man it could be any sensor tps, map,but its soundin like the iacv try replacin the idle air control valve....... they are by no means cheap but try it..... go to a junk yard and try to find one.....

check this link it will tell you a lil why a car has all these sensors....
http://en.wikipedia.org/wiki/Digifan...agement_system

 

on the back of the tb theres a plate with 2 bolts take the plate off. with a screw driver turn the palstic nut all the way in .

 

ok i'll c so i take off the plate for what?

 

thanks dude I'll check it out. funny thing that when it warms up its all cool and btw ther is no cel

 

My 95 does the same thing, but not as bad. It goes from about .8k to 1.2k until it warms up and then stays steady around 1k

 

OP: Did you also clean and adjust the FITV?