So ive been having idle issues for the past 5 months. Been lazy and busy to get around to fixing them but finally today i did. I replaced the IACV with a working one and the FITV. Still the idle is bouncing around from 700-1200rpms. I now at this point have no other idea in what it could be. Ive sprayed around every vacuum hose, and all around the IM and did not see any spray blowing around.
Any ideas?
Thanks G2IC
DB1NC
Have you tried running the engine with the rad cap off for 15 or 20 minutes? (AKA “Bleeding the coolant system”, as usdm420 mentioned below) I had this problem before after running low on coolant and couldn’t figure it out. Once I did this, idle returned to normal. Good luck man, idle problems can be a bitch but usually can be worked out with very systematic troubleshooting.
[QUOTE=DB1nc;2255914]So ive been having idle issues for the past 5 months. Been lazy and busy to get around to fixing them but finally today i did. I replaced the IACV with a working one and the FITV. Still the idle is bouncing around from 700-1200rpms. I now at this point have no other idea in what it could be. Ive sprayed around every vacuum hose, and all around the IM and did not see any spray blowing around.
Any ideas?
Thanks G2IC
DB1NC[/QUOTE]
The point of spraying carb cleaner around vacuum hoses, etc. is not to see if it blows around, it’s to see if your idle spikes up at all. Carb cleaner would make your idle spike up a little because it’s essentially an added combustible being sucked into your engine.
After you cleaned the IACV and FITV, did you bleed the coolant system? If not, try that first.
Yes I bled the coolant system. This point im going to replace my intake manifold gasket. When i had to replace my head gasket i got a little poor and had to reuse the IM gasket. So im try that to see if that is my problem.
But no the idle didnt spike up any at all when i sprayed carb cleaner around the vacuum lines
Spray the carb cleaner around the intake manifold where it meets the head. Sometimes tough if the sealing issue is on the lower part though.
Mine was doing the same thing man, and I checked everything. The only thing that got mine to stop was to disable the iacv on my chip. So technically I never fixed it…I just worked around it
One solution I found was the throttle cable. Just a tad too tight and It can cause a fluctuating idle. After trying everything and almost giving up, I loosened mine on my civic (B16 swap) and it finally fixed the idle.
the throttle cables fine. All this didnt start happening to after doing the headgasket job, and as i said reusing the IM gasket, that maybe my culprit, since ive replaced the coolant hoses and clamps, the IACV & FITV
does the idle bounce when it warms up and after it tries to idle? i.e. high idle and low idle bounce or just low idle