Bouncing IDle

[240240]

Hey guys---im experencing bouncing idle when my car 1st starts up, but after it runs a while it seems to balance out. When I 1st start my car the idle will bounce from about 500 to 1000 rpm....I running stock BOV, stock MAFS

Any ideas?Thanks

[fly240]

hey, I have the same problem now. Before...my idle stable at 1500 for start-up, after i loossen pull all 4 screws at the maf plug to see inside. I put it back on, I notice the idle is bouncing for start up. after it gets hot, it stable at arounf 1500 and after driving for 30 minutes to 1 hour the idle is drop to 1000 rpm....I'm very sure it's either my maf or my timming, I just turn the CAS with out the timming gun, i will have to turn it down to see what happen....

If you get your solve, let me know.......

[krayton]

what engine are we talking about?

[kouki-gymkhana]

You might want to check your coolant temperature sensor. My RB25 had an idle issue that seemed exactly like a vacuum leak but I couldn't figure it out after spending endless nights trying to find the "leak." As it turns out, the sensor was making intermittent contact and once I fixed it, it idles like a champ!

[fly240]

I have a rb25, where is the coolant sensor?......how did you get it fix....

[240240]

I have a rb20det----were is it located?