stevensLS1

iTrader: (2)

this has been going on for a while now but just got worse lately. whenever i push the clutch in the car wants to rev up and not idle down. ive got a ported throttle body on my car and ive cleaned the t.b. also there is a hole drilled in the butterfly. im thinking its a tps sensor or could the t.b be bad? not sure please help.

TransAm_00

iTrader: (1)

Throttle Positioning Sensor

SSilverSSurfer

iTrader: (8)

i guess its time for a 408 steven

xaon

iTrader: (12)

more detailed specs on the car's setup? I'd guess that you've got a cam and such in the car and your throttle cracker/follower settings in the tune need to be tweaked.

stevensLS1

iTrader: (2)

well its got an "s" cam in it and i had chuck retune the car and it was having fuel problems but he said he fixed that?

xaon

iTrader: (12)

So, The car idles fine, but when driving around, you press in on the clutch and the RPM's raise up and hang (oh, somewhere 1600-2200rpm) until you come to a complete stop?

TheBlurLS1

iTrader: (8)

Mine does this. The RPMs hang at like 1600 or so, then drop down to idle speed when I stop. It really helps with driveability.

Mine was tuned by Chuck as well.

xaon

iTrader: (12)

It sucks for driveability, and it's a common issue that is easily fixed if the tuner gives it the attention it deserves. Generally it is the throttle cracker table out of whack from the increased airflow. Sometimes the throttle follower table also needs to be tweaked.

I'd venture to say that when your car is hanging at 1600, your throttle cracker PID (in a scantool such as autotap/efilive) is sitting at ~2.5

stevensLS1

iTrader: (2)

actually sometimes it doesnt idle down at all. i usually start to release the clutch then it idles down but if the car starts to move ill push the clutch back down and it idles right back up. i seem to notice it when the car is hot also.

indyboom

iTrader: (11)

check your throttle cables, there adjustable

Jimmy P

iTrader: (177)

When you start the car, does the idle jump up real high, then slowly goes down? Or does does it only do this when you press the clutch pedal in?
I have a auto trans and when I start the car, the rpm's jump to about 1900 rpm's, then lower down to 950-1000 after about 10-15 seconds. I am thinking it may be because of the large cam in there, but not sure.