Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > Current Chevrolet Car Models > Impala
Sign in using an external account
Register Forgot Password?
Search

Impala While undergoing many facelifts in its history, the Impala has proved itself to both civilians and police forces as one of the most capable 4-door cars GM has ever offered. Currently moving towards its 10th generation the Impala is one of the longest lasting and popular models.

2014 Chevrolet Impala
Includes: Bel-air
Platform: B-body & W-body

Welcome to Chevrolet forum!
Welcome to Chevrolet forum,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Chevrolet forum today!


Reply
 
 
 
 
LinkBack Thread Tools
  #1  
Old 01-12-2009, 12:06 AM
 
Join Date: Jan 2009
Posts: 1
Default Car is tugging/shaking/jerking at high speeds?

Just curious if anyone else has had this problem. Please excuse my lack of car knowledge if I get any of this wrong..

I have an impala (2000).

Car is jerking/tugging intermittently at highway speeds, but sometimes at lower speeds (usually around 20-25mph and sometimes 40mph). When cruise control is set around 60-70 the car almost always shakes. For some reason, the shaking isnít as bad at 75+ MPH.

Immediately after I let off on the accelerator (on the highway) the car shakes and hesitates a little. When EGR valve is unplugged almost all tugging and shaking goes away.

My car has been doing this for about a year now - on and off. Iíve left the EGR valve unplugged for months at a time. Had the spark plugs and coils (I think?) replaced in march of í08.
Register today for free or log-in if already registered to remove this ad!
Reply With Quote
  #2  
Old 01-22-2009, 11:38 AM
milwaukee_01impala's Avatar
CF Junior Member
 
Join Date: Oct 2008
Posts: 50
Default

if you've unplugged the egr valve and the shaking/tugging went away then i think you just answered your own question. replace the egr valve. either that or get your catalytic converter checked. the converters on the impalas have a tendency to go bad.
__________________
2001 impala, 3.4, 1.0dhp pcm, fenderwell intake w/k&n filter, 2.5" downpipe-exhaust w/flowmaster 40, 17" helo slick rims, LED tail lights/front turn signals, multi color led LS cluster/ hvac controls, impala embroidered floormats, 20% tint, aftermarket moonroof, turn signal mirrors
Reply With Quote
  #3  
Old 01-22-2009, 04:57 PM
Junior Member
 
Join Date: Dec 2008
Location:
Posts: 29
Default

I've read similar symtoms related to the throttle position sensor. When it starts to go, it doesn't know what you are doing with the gas petal. You might consider that.
__________________
Wildman, San Francisco
2000 Malibu V6
Reply With Quote
  #4  
Old 02-11-2009, 09:49 PM
HotSauce6226's Avatar
Impala Super Moderator
 
Join Date: Jan 2008
Location: Shelbyville, KY
Posts: 813
HotSauce6226
Default

Clogged cat? I agree with milwaukee
__________________
2003 Chevy Impala - Base 3400 - Few Mods
2004 Chevy Impala SS Indy Edition - 3800 Supercharged - Alot of Mods
Contact me for LED interior conversions
Reply With Quote
  #5  
Old 02-24-2009, 07:04 PM
Junior Member
 
Join Date: Feb 2009
Posts: 1
Default

is the check engine light on? if cat convertors are bad, check engine light will come on and throw code p0430.
Reply With Quote
  #6  
Old 02-26-2009, 09:47 AM
CF Junior Member
 
Join Date: Nov 2008
Location: Marion, Va
Posts: 58
Default

Quote:
Originally Posted by psthereal View Post
is the check engine light on? if cat convertors are bad, check engine light will come on and throw code p0430.
A stopped up converter does not throw a code. However, you won't go very fast very far if it is stopped up so that doesn't sound like the problem.
Reply With Quote
  #7  
Old 03-07-2009, 12:55 PM
Gwampa's Avatar
CF Veteran
 
Join Date: Nov 2008
Location: Albuquerque, NM
Posts: 1,025
Default

Go to a salvage yard an buy a used EGR, clean it and try it. If that is it (which it probably is) either use the junk unit or go buy a new one. Sometimes ya just gotta use common sense and not depend strictly on computers to do your thinkin' for you. (LOL) Hell, mechanician can be fun!!
__________________
"I USED TO CARE".......but I take a pill for that now.
Reply With Quote
Old 03-07-2009, 12:55 PM
 
 
 
Reply

Tags
1998, 2001, car, cat, chevrolet, clogged, code, high, higher, highway, impala, jerking, jerks, p0430, shaking, speeds, tahoe, tugging


Thread Tools

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On


Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 05:01 PM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO ©2010, Crawlability, Inc.

Emails Backup