[ryanschillinger]

Say I rev to 3000 rpm in 1st gear, then clutch it to shift to 2nd... The rpm stays at 3000 for about a half second before dropping back down. It makes it hard to smoothly accelerate. I was thinking maybe some kind of Idle Air Control Valve, but when it idles, it idles below 1000 rpm, just like it should. It passed smog with almost no emissions, and there is no check engine light. Just wondering if anyone had ideas what might be causing this.
BTW the truck is a 2003 with the 4 banger and stick shift.

 

[ryanschillinger]

When I lift my foot off the gas, the pedal comes up freely, and I can't find it binding or sticking anywhere. I might try to post a video to youtube of the tach doing it, and put a link to show what it's doing....

 

[ryanschillinger]

It's not flywheel because even if I leave it in gear and slow down to drop the rpm below 1000 it creeps back up to about 2000 before dropping to 1500 then back to about 1000. Do these trucks have an idle air control valve or something? If I put it in 1st gear, no gas, and let the clutch out, it just stays about 1500 rpm and goes. It's really annoying. I've never had anything do this before unless there was a vacuum leak or something...

 

[ryanschillinger]

Yeah, my plan for today is to clean the MAF and try to clean out the IAC valve. The Hayne's manual says to test it for resistance between the terminals, so I may as well try that as well. Anyone cleaned the IAC?? Anything in particular I should know before doing it?