Jumping rpms when shifting

austin101385 · 12-13-2007, 04:44 PM

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]

Donnie's GTS · 12-13-2007, 05:02 PM

i have the same thing, take your foot off the gas when you shift, its pretty touchy, theres a mod you can do to get the revs down really well, google can probably help you better on this one.

austin101385 · 12-13-2007, 05:07 PM

Quote:

ORIGINAL: BullittJim

i have the same thing, take your foot off the gas when you shift, its pretty touchy, theres a mod you can do to get the revs down really well, google can probably help you better on this one.

I actually tried this. When it happens really bad, I drive the rpms up to aboud 1200 rpms and shift into neutral, letting off both the gas and clutch, the rpms hesitate, thenrise up to about 2200 rpms, then "slowly" go back down.