i have a obdII jdm b18c with obdII jdm p72. i have this weird idle problem and have spent about two weeks ****** with it. i can't figure it out. i don't have a fitv obviously so it's not that. i have tried three different iacv's and still does the same thing. idle surges slightly and when rolling idle jumps to 2000 rpm and stays there until i come to a stop. disconnected vss and problem went away. tried three different vss's and still does the same thing. tried a known good ecu and still same thing. what is my problem am i just a dumbass or what?

 

never mind my comment... i see you already tried that

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sleepyEK &raquo;</TD></TR><TR><TD CLASS="quote">i have tried three different iacv's and still does the same thing. </TD></TR></TABLE>

i have covered that. and the original one i cleaned and stuff and still did the same thing. all of them did. funny thing is when i turn the a/c on, it idles up like it should so i know the iac is operating somewhat.

 

going crazy...

 

maybe you have a leak in the manifold????? if you have some break cleaner, spary it around your manifold, coolant lines and what not.

 

thanks for that suggestion, but that was one of the first things i looked at was for vacuum leaks all over, sprayed carb cleaner and everything.

 

yeah someone needs to help Josh and I out because his car is driving me crazy haha. I cant think of what else to do other than take the whole intake mani off and the throttle body and replace all the damn vacuum lines for that IAB stuff. I tried an old trick where you cover the throttle body up with something while the car is running and it died and we also sprayed carb cleaner on everything looking for a leak with no good results. Running out of ideas all together for his car.

 

bump

 

just a hunch but maybe the fact that i don't have the exhaust on (been waiting on parts) could be the culprit.