high idle - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 03-06-2012, 08:49 PM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2009
Posts: 205
Thanks: 0
Thanked 0 Times in 0 Posts
PaladineSLE is on a distinguished road
Default high idle

Hi guys. I've been driving around town in my 2000 pontiac bonneville sle with idle around 800 to 1100 and its top swapped its been top swapped for over a year now so I don't think the problem is that. Sometimes it goes down to 6 or 700 that'* when it feels normal and at800 and 900 its tolerable but over 1100 it bucks when I brake and its super frustrating. I think it might be a vaccum leak but I haven't found one and I carb cleaned the tbs or whatever that sensor is called or idle motor? Before I cleaned it it would idle from 2000 to 2500 on rare occasions when this would happen the car would shift the transmission on its own and cruise upto 45 mph by itself then braking would make the car buck harshly please help thank you
PaladineSLE is offline   Reply With Quote
Old 03-06-2012, 10:11 PM   #2
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,643
Thanked 995 Times in 772 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

No check engine light or anything?

If you have access to a laptop with scanner, check your TPS sensor.
Mike is offline   Reply With Quote
Old 03-06-2012, 10:46 PM   #3
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2009
Posts: 205
Thanks: 0
Thanked 0 Times in 0 Posts
PaladineSLE is on a distinguished road
Default

Nope no check engine light :/ and I have the torque app for my phone it sees no codes what would I check for to see if the tps is acting up?
PaladineSLE is offline   Reply With Quote
Old 03-06-2012, 10:54 PM   #4
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,643
Thanked 995 Times in 772 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

At idle, you should see the PCM seeing 0%. You can do this with the engine off/power on. Just gently push the throttle down to 100% and watch the display. The numbers should not jump around.
Mike is offline   Reply With Quote
Old 03-08-2012, 04:42 AM   #5
Member
Posts like a V-Tak
 
Join Date: Feb 2012
Location: San Diego, CA
Posts: 72
Thanked 0 Times in 0 Posts
robone619 is on a distinguished road
Default

Sounds like a bad TPS to me, I'ld take a timing gun to her also

(Skip to the part where they break out the voltage meter)
robone619 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Idle Problem first, now high idle 98 Buick LeSabre Kimberly Buick 16 08-09-2015 09:41 PM
From rough idle to high idle randman1 1992-1999 25 09-07-2004 09:20 PM
'00SSEi:rough idle,high idle...Please Help.... GTP2SSEi General GM Chat 2 07-29-2003 01:46 PM
Idle idle or wacky tach? 94bonne98 1992-1999 6 01-31-2003 12:03 AM


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 10:38 AM.


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.