austin101385

Eversince I bought my Bullitt, this past October, it has this problem every now and then. When I'm driving and go to shift from any gear (1st to 2nd, or 2nd to 3rd, and so on, through every gear) the rpms rise. The other day, I was in 4th gear, slowly accelerating, shifted into neutral at about 1200 rpms and watched it slowly rise right above 2000rpms, stay there for a about 2 or 3 seconds, and then go back down. At one point, the rpms would not go below 1500rpms while sitting at idle (is that normal)? And when this happens, I can rev up to about 2400rpms in neutral and it stays there for about 2 or 3 seconds before "slowly" going down.

I heard that Ford is very bad about their Idle Control Air Valve, so I replaced that and it seems like it worked for that day, but it is still occuring.

It's not happening all the time, so I thought I could rule out the possiblity of a vacuum leak.

Does anyone know what could be causing this???

Thanks,
Austin[/align]

Sxynerd

IAC or vacum is my guess.

01snake

ima just throw this out here

are you letting off the gas?

dtkikols

so you have a k&n or oil your air filter? if you do you might have gotten some oil on the MAF. clean it with some quick dry electrical contact spray.

4.698GT

damn you stole mine.

Probably a small vac leak somewhere.

austin101385

lol, of course I let off the gas pedal...I've been driving a stick eversince I could drive. I do have a K&N air filter, but this was happening before I bought it.

When this does occur, I shift into neutral (let off the gas pedal) and the rpms rise about 500 or more rpms, stay there for 3 seconds, and "slowly" fall

dtkikols

mine does the same thing if i depress teh clutch but only at highway speeds. itll go to like 1500rpm then slowly come down as i slow down. but it doesnt do it when im driving around town though

1fstblckgt

IAC... Same thing happened to me for months.

austin101385

I already said in my first post that I already installed a new IAC

1fstblckgt

Well find the problem yourself then chicostick.