Throttle sticks from idle - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 10-10-2004, 05:11 AM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Oct 2002
Location: Genoa, Illinois
Posts: 4,013
Thanks: 0
Thanked 0 Times in 0 Posts
Allmachtige is on a distinguished road
Default Throttle sticks from idle

Today I noticed if I let my car sit and I start it up I can't move the gas pedal unless I give it a small "oomph". Then it feels like I free'ed it from being stuck somehow. It also did this again just now and when I let off the gas and applied a little throttle while coasting on the road I felt a slight 'give' when I first give throttle...but after that point it moves freely to WOT and back.

I opened the hood and played with the throttle and I felt the same small resistance from idle position. Ideas?
Allmachtige is offline   Reply With Quote
Old 10-10-2004, 11:32 AM   #2
Member
Posts like a V-Tak
 
Join Date: Jul 2004
Location: Humboldt Sask. Canada
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Flatlander is on a distinguished road
Default

I would check to see if the throttle plate is closing and binding on the throttle body around the edge of the plate. If the throttle stop screw on the throttle body is turned a little to far out it will allow the throttle plate to close totally against the inside of the throttle body and cause it to stick in the bore. The screw should be adjusted so the throttle plate is just held open enough to eliminate the sticking. The adjustment is very small and the IAC compensates for the tiny bit of additional air bypassing the throttle plate. It could also be a buildup of carbon on the edges of the plate or cable sticking. I had the sticking throttle after replacing the throttle plate on my Sonoma truck and found out about the throttle stop adjustment after buying a new cable. Hope this gives you something to check out.

Flatlander
Flatlander is offline   Reply With Quote
Old 10-10-2004, 12:35 PM   #3
Senior Member
Certified GM nut
 
Join Date: Feb 2003
Location: Georgia
Posts: 2,095
Thanks: 0
Thanked 0 Times in 0 Posts
DrJay is on a distinguished road
Default

Lucky its not happening in the other direction! I actually had that happen once. Playing around with the air filter on my old monte carlo, didn't put the wingnut back on and it somehow found its way to the linkage when I was at 1/2 throttle. scary crap...still don't understand how it did it though, the 'magic wingnut'
DrJay is offline   Reply With Quote
Old 10-10-2004, 01:03 PM   #4
Senior Member
True Car Nut
 
Join Date: Nov 2002
Location: Texarkana, Texas
Posts: 6,041
Thanks: 0
Thanked 0 Times in 0 Posts
Damemorder is on a distinguished road
Default

My "MAF Mod" TB did the same thing when I started playing with it. If you look on the "black arm type peice I can't think of the name to" there'* the shaft that goes to the TP and the other shaft goes the a large pivot. pull off the "black arm thing" and apply some cleaning and axle grease to the pivot shaft.
Damemorder is offline   Reply With Quote
Old 10-10-2004, 01:47 PM   #5
Senior Member
True Car Nut
Thread Starter
 
Join Date: Oct 2002
Location: Genoa, Illinois
Posts: 4,013
Thanks: 0
Thanked 0 Times in 0 Posts
Allmachtige is on a distinguished road
Default

Uhhh...dame that doesn't make sence bud.
Try explaining a little more.

However I'm slapping myself in the face because I think Flatlander is right. I have the throttle stop screw WAY out to make sure I get a low idle voltage, but at a certain point the voltage won't go down anymore if I keep loosening the screw....so I think its out too far. I'll try that first, thanks.
Allmachtige is offline   Reply With Quote
Old 10-10-2004, 01:53 PM   #6
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

That makes sense. It'* a balancing act between the rotation of the sensor and the screw. It may take a few adjustments to hit it right.
willwren is offline   Reply With Quote
Old 10-10-2004, 03:17 PM   #7
Senior Member
Posts like a Northstar
 
Join Date: Mar 2003
Location: Brewerton NY
Posts: 551
Thanks: 0
Thanked 0 Times in 0 Posts
karfreek is on a distinguished road
Default

I have the same problem after mine sits overnight. I just tap the gas before I put the key in, kinda like my old Catalina when I set the choke on a cold morning. Ahhh...the memories.

Jay
karfreek is offline   Reply With Quote
Old 10-10-2004, 03:18 PM   #8
Senior Member
Posts like a Corvette
 
Join Date: Aug 2003
Location: Elizabethtown Pennsylvania
Posts: 1,205
Thanks: 0
Thanked 0 Times in 0 Posts
h1081dan is on a distinguished road
Default Re: Throttle sticks from idle

Quote:
Originally Posted by Allmachtige
Today I noticed if I let my car sit and I start it up I can't move the gas pedal unless I give it a small "oomph". Then it feels like I free'ed it from being stuck somehow. It also did this again just now and when I let off the gas and applied a little throttle while coasting on the road I felt a slight 'give' when I first give throttle...but after that point it moves freely to WOT and back.

I opened the hood and played with the throttle and I felt the same small resistance from idle position. Ideas?
WOW, I thought I was the only one with this problem. It feels stuck, then when I put enough force to free it, I end up pealing out. I always hate that. Mine seems worse in colder weather.
h1081dan is offline   Reply With Quote
Old 10-10-2004, 06:01 PM   #9
Senior Member
True Car Nut
Thread Starter
 
Join Date: Oct 2002
Location: Genoa, Illinois
Posts: 4,013
Thanks: 0
Thanked 0 Times in 0 Posts
Allmachtige is on a distinguished road
Default

K, I was playing around with the idle screw for a good 30 minutes and found a "sweet" spot where it just barely keeps the plate open (or so it seems) because I used my delicate ( ) hands to feel for any resistance...there was none by the time I finished. Tomarrow morning'* cold air will show me if my efforts were in vain or not.
Allmachtige is offline   Reply With Quote
Old 10-10-2004, 10:26 PM   #10
Senior Member
Posts like a Turbo
 
Join Date: Jul 2004
Location: Woodstock Ill.
Posts: 214
Thanks: 0
Thanked 0 Times in 0 Posts
Ranger is on a distinguished road
Default

I'd bet all you need to do is clean the TB. Use a tooth brush, a rag and some carb cleaner. Hold the throttle plate wide open and clean the TB bore. Particularly the perimiter where the throttle plate meets it. Also clean the back side of the throttle plate and it'* perimiter. You'll likely find it is all carboned up.
Ranger is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
99 park ave throttle sticks at 2200rpm randomly eltatertoto Buick 12 01-16-2013 09:20 PM
wanted: 3 sticks of 512MB SDRAM, PC100-133, 168-pin harofreak00 Lounge 13 09-13-2007 11:45 AM
dvd/cd player sticks out khops Audio (and aftermarket electronics) 7 01-29-2007 11:33 PM
Tran sticks in third at 60-100 mph TDRAL107668 1987-1991 5 09-09-2005 02:47 AM
Accelerator Sticks markwb 1992-1999 7 01-02-2003 01:33 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 03:38 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.