am using obd1 h22 with a p28 computer but once i start my car it idle high and steady. but once the car warms up the idle drops and start jumpin from 600- 1000 rpms. also am avergaing 160 milesto the tank. my main belive is cuz am using the wrong ecu but does anybody have any suggestions. also does anybody know a good shop in the san diego area to get my car tuned and maybe chip the ecu. thasnks for the help

 

so you are running a stock p28? why?

sounds like you have a vacuum leak.

 

i know its the wrong ecu but that was the only thing i had and i read on alot of threads of people using chipped p28 ecus on der h2b setups. but am new to cali so i dont know alot of shops in the san diego area top get the ecu chipped

 

my civic had the same problem, but only when its cold outside. its either a vacum leak or theres a valve right beside and under the intake manifold, its a little metal plate that has 2 10mm bolts in it, take that off and theres a little ball bearing like thing, push that down and spin the plastic piece that can only be spun with the bearing thing pushed in, its spring loaded so it may be kinda hard to tighten it. i have no clue what the valve is called and im running a b18c1 block out of an integra GSR and a b16a2 head so it may not be anydamnthing related to you so this reply may be completely and udderly useless to you... Its way more common in acuras the problem I had was...
soooo more than likely a vacum leak.
haha.

 

check your fast idle thermo valve and make any necessary adjustments. make sure your IACV is functioning and that there are no vac leaks. that should fix your idle problems.

then get the ECU tuned.

 

hey thanks yea am gonna try to clean the iacv dis weekend. any other suggestions. is der any way to check for vacuum leaks. am thinkin of puttin my hand on the throttlebody and if it contiounes to run then der is a vacuum leak am i rite