Shuddering under load! - 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 04-11-2003, 03:51 PM   #1
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2003
Location: Alliance, Ohio
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
Bob Keyes is on a distinguished road
Default Shuddering under load!

I just read the post from "SSE WANNABE" and my '97 SSE has the same problem. It is extremely annoying! Mine only does it at highway speeds when the motor is good and hot, it is more like a surging. I can see the tach going up and down (even with the cruise on) when it does it. It is kind of like being in a boat in the middle of lake Erie! I have not had any codes come up and have changed plugs and fuel filter. I will try changing the wires now that I read the other repsonses. I just haven't had the cahoonas to take it to a shop for fear of being raked over the coals $-wise! Any other information on this problem would be appreciated.

Bob
(sea-sick at 7o mph)
Bob Keyes is offline   Reply With Quote
Old 04-11-2003, 05:14 PM   #2
Senior Member
Posts like a Northstar
 
Join Date: Feb 2003
Location: Mount Vernon, Ohio
Posts: 530
Thanks: 0
Thanked 0 Times in 0 Posts
con10der is on a distinguished road
Default

NO codes...sounds strange..I would have first considered Plugs/Wires etc..Strange there is no codes!!!! Does it fell like maybe Tranny surging?? Good Luck
con10der is offline   Reply With Quote
Old 04-14-2003, 01:23 PM   #3
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2003
Location: Alliance, Ohio
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
Bob Keyes is on a distinguished road
Default

I am not sure about the tranny surging. I guess can't tell. What would that feel like? I assumed it was something with the engine because the tach moves up and down as the thing "surges" down the highway. I did not have time to change wires over the weekend but it is on my list of things to try.
Bob Keyes is offline   Reply With Quote
Old 04-16-2003, 12:36 AM   #4
Senior Member
Posts like a Northstar
 
Join Date: Dec 2002
Location: Bellbrook, Ohio
Posts: 547
Thanks: 0
Thanked 0 Times in 0 Posts
compyelc4 is on a distinguished road
Default

In o'drive, I doubt you would get an engine surge large enough to affect your tach to any great degree. The gearing of those puppies is such that there would have to be one helll of a mph change to make your tach change significantly.

My bet is that your transmission is either slipping or "hunting" from 3rd to o'drive and back. Probably the former though. Is your trans fluid up to level it is supposed to be at idle? What color is it? What does it smell like? Burned smell, etc.

Does your tach change + and - in response to assumed engine speed?

Give us more info.
compyelc4 is offline   Reply With Quote
Old 04-16-2003, 05:02 PM   #5
Senior Member
Posts like a Northstar
 
Join Date: Jan 2003
Location: Northern KY
Posts: 511
Thanks: 0
Thanked 0 Times in 0 Posts
Phantom is on a distinguished road
Default

try to knotice if your hood shakes at all
Phantom is offline   Reply With Quote
Old 04-18-2003, 05:25 PM   #6
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2003
Location: Alliance, Ohio
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
Bob Keyes is on a distinguished road
Default

Well, tranny fluid is ok. Level is at top and it doesn't smell burnt or look bad. No apparent shaking of the hood. But, it was really doing it on my way to work this morning. At 60 mph tach is around 2200 rpm. Under load this morning the tach going up and down between 2200 to 2700 rpm. I can feel the car pull and let go in sync with the rpm fluctuations. The tranny will not shift out of OD though unless I punch it. When I punch the gas the thing picks up and runs great. As soon as it goes back into OD and I hit a hill or load the gas pedal a little ( like to accelerate slightly) the surging begins again. The only way to get it to quit is to let off the gas and subsequently slow down.

Thanks for all the reponses. Hopefully I will get this resolved.
Bob Keyes is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
missing and shuddering under mid acceleration mrcivic 1992-1999 5 07-14-2005 11:44 PM
misfire under load t-type 1992-1999 31 05-12-2003 11:44 PM
Car shudders in high gear under load - transmission? ssewannabe 1992-1999 43 05-09-2003 12:32 PM
Still Missing under load Bdd8591 1992-1999 4 02-25-2003 01:22 PM
Loss of power/ miss under load HELP Bdd8591 1992-1999 4 01-23-2003 07:22 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 09:47 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.