Somebody help!! I have a 1997 Prelude motor in my 92 accord and ever since i've had the engine in it, when the engine is running when it first starts up, the idle moves slowly from 1000-2000 rpm back and forth. Then once the car warms up, it will idle fine at 750 rpm for about 30 seconds at a time then drop all way down, and it usually stalls...sometimes it comes back up to 750, but usually stalls. If you've heard of something similar to this, please let me know. THANK YOU!

 

what ecu is in there?

 

its a 1993 canadian prelude vtec ecu

 

my b18 kinda does this, and i believe it's a vacum problem, air is leaking out of the intake somewhere and you are loosing pressure, chek all your vacume lines and your EGR valve.

 

why do you think it would be a vacuum problem? do you know somebody else who had it and that was the problem, or is that just what you think?

 

i also think it would be a vacuum problem. happened to me with my h23 in my 92 accord...payce

 

vaccuum leak, check all your hoses and such, make sure there arn't any cracks, if thats fine, you need to adjust the intake/exhaust rings near the egr. i wil try to find the site on how to do it.................hondasociety is down

 

http://board.hondasociety.com/...nt=22
dunno if it is the same setup on an H series, but its worth a shot posting