sdwndr

This hasn't happened very often (about three times in the last two months or so), but sometimes after I accelerate away from a stop and then lift off the gas, the engine will momentarily rev a little higher, even though I've lifted my foot off the gas. The car drives perfectly fine other than that. Anyone know what might be causing this?

slowstang06

do you have an aftermarket tb?

sdwndr

Nope, no aftermarket TB. Just a C&L cold air intake.

Could this be from a dirty TB?

harraid5711

it could indeed be a dirty/sticking TB. if it continues after cleaning, i would look into replacing the TPS sensor.

i had some odd throttle behavior that was fixed by replacing this. takes 20 min and $70

kcmarti

I had this problem a few years back shortly after installing my JLT-II. It didn't happen all the time and wasn't bad enough to warrant fixing it at the time. I then installed a Bama tune and started getting a severe lope at idle - I cleaned my throttle body and MAF and never had either problem again.

cool_it

I bought my 07 used with 14k miles and it does it more often than not. I thought is was me. Everything is stock as far as I know and it seems to do it more when it's colder out. The other thing I noticed is a slight hesitation in accelaration when first starting it after it has sat awhile. It still has the orginal filter which looks pretty clean.

scoots

Sounds just like an issue I was having. When I looked at the TB I found quite about of carbon build up around the butterfly valves. Cleaned infront and behind the valves and instantly noticed a better idle and elimination of rpm surging I was getting.

Scott

foolio2k4

I get that often when i shift quick. I thought it was a lag in throttle/fuel injection resulting in a little more combustion when i press in the clutch. I guess i will have to check my TB. But the front of my tb looks clean.

daltron

+1

I had idleing problems, as well as what the op mentioned. Cleaned all the electronic connectors to the TB/intake and the MAF sensor, and everything was fine.