90 Integra idle problem

[BLACK_EK9]

Just got a steal on a running project, 90 Integra RS. I know it has an adjustable fuel pressure regulator, B&M fuel pressure gauge, AEM cai, and some ricer exhaust. When you turn the car on it will idle @ 2k once it warms up it will bounce from 900-1800rpm continuously. I don't know what it is and wanted to see if someone could throw out some suggestions.

[jadakid88]

iacv

[BLACK_EK9]

Thanks will clean that out tomorrow

[Timinater]

jump your ecu and see what code its throwing, probably iac valve, maybe tps.
heres a link how to check. gl
http://www.hondaprelude.to/articles/maintenance/check_engine.html

[GermanMuscle]

did you check for a vacuum leak already? that was the problem with mine before

[BLACK_EK9]

i had no cels and i know how to check them. i checked as many vacuum lines as possible last night and everthing was fine. today i picked up some brake cleaner and took the iacv off cleaned it and ran the lines back to it. seems like the previous owner bypassed the iacv, why i dont know. reconnected everything and now sounds good and very stable idle. thanks for all the help!

[green91]

Check your coolant level also

[green91]

BTW the lines on the IACV aren't for vacuum, they are for coolant and are unnecessary in georgia's climate

[vtecgsrguy]

i had no cels and i know how to check them. i checked as many vacuum lines as possible last night and everthing was fine. today i picked up some brake cleaner and took the iacv off cleaned it and ran the lines back to it. seems like the previous owner bypassed the iacv, why i dont know. reconnected everything and now sounds good and very stable idle. thanks for all the help!
I THINK THAT RIGHT THERE FIXED YA PROB. HUH???? lol... :thinking: