Throttle sticks, only when car on
10-10-2003, 01:28 AM
#17
Banned
Join Date: Mar 2001
Posts: 3,249
0 count IAC is bad. That means that the engine is getting all the air and possibly more it needs without opening the IAC at all. You typically want 20-30 counts which gives it room to adjust itself. What that can mean is that there is a leak somewhere in the system. Have you checked for that?
10-10-2003, 09:50 AM
#19
Banned
Join Date: Mar 2001
Posts: 3,249
Spray the hoses with squirts of brake cleaner. Pretty mych every hose from the TB to the firewall that carries air. If the RPM goes up, that means the leak is there. Supposedly another way is to use a propane torch with the flame off doing the same thing. Either way, you need to be out in the open.
Block Learn Mode: link
Block Learn Mode: link
10-10-2003, 09:52 AM
#20
Banned
Join Date: Mar 2001
Posts: 3,249
If no leak is detected, the next thing would be to make sure the TB is clean. That means removing the IAC housing and the IAC and make sure there is no carbon build up on the IAC pintle. If that is ok then maybe you have a bad return spring which is what is supposed to close the TB blades, assuming the blades are fine.
10-10-2003, 12:49 PM
#22
Registered User
Join Date: Sep 2003
Location: Charlotte, NC
Posts: 1,357
My throttle does the same thing except it just slowly drops down from about 1500 rpms. My pedal is also really stiff while the car is on, but when it is off the pedal is easy to push. Think maybe my blades are sticking too?
10-10-2003, 01:00 PM
#23
Registered User
Thread Starter
Join Date: Jul 2003
Posts: 194
My pedal seems to be fine, I don't notice it being overly stiff or anything. Mine will actually stay at the RPM forever until I tap on the pedal real fast and hard. It's kinda scary to be driving around at 50 and letting of the gas and having the car continue to go at 50. Feels like the cruise control is on or something.
10-10-2003, 06:53 PM
#24
Registered User
Thread Starter
Join Date: Jul 2003
Posts: 194
Don't know if it's related, but the engine is rough even above idle, then smooths out as the revs go up, like say past 1500 to 2000 rpm. Idle at about 600 rpm really shakes the car. The shake is very consistent pattern, like I have big cam in there or something. As I gently step on the pedal, the shaking gets less and less violent as the revs go up. Is this related to the TB issues??
Thread
Thread Starter
Forum
Replies
Last Post
chevroletfreak
LT1 Based Engine Tech
202
07-04-2005 05:00 PM