Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Chevrolet > Blazer > Problem Diagnosis
Problem Diagnosis Got a problem you can't fix? Post here and one of our members will answer as soon as possible.
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools
Old 05-23-2016, 11:28 AM   #1
duckhunter
AF Newbie
 
Join Date: May 2016
Location: Powhatan, Virginia
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
GMC Jimmy COLD DRIVEABILITY ISSUES.

I am experiencing an intermittent cold driveability issue with my 2000 GMC Jimmy 4.3L, automatic, 4x4. Symptoms: on initial cold start engine starts and idles fine. Upon acceleration at approximately 1800-2000 rpm the engine starts to surge right as it is trying to shift. When it does shift the engine runs smoothly until is reaches the same rpm range. I can accelerate through the surge and the vehicle will power right on up. No CEL. Fuel pressure and supply are fine. I have also noticed that the TCC will not engage when this is happening. At highway speeds the engine surges as if a fuel/air issue. Again no TCC. After the initial drive I can turn engine off for 15 minutes and restart with no driveabilty issues. Tried the tap on the MAF sensor. No problem. I disconnected the TPS and the engine ran fine for three days all be it with a CEL. Replaced TPS and ran fine one day. Ambient temp that day was a little higher that day. Next day back to the same old issues. Cap , rotor and plugs have been changed. Any ideas ?
duckhunter is offline   Reply With Quote
Old 06-01-2016, 07:49 AM   #2
rhandwor
AF Enthusiast
 
Join Date: Sep 2006
Location: Athens, Georgia
Posts: 4,662
Thanks: 0
Thanked 64 Times in 64 Posts
Re: GMC Jimmy COLD DRIVEABILITY ISSUES.

Go to Auto Zone or Advanced Auto and get the codes pulled. This is a free service.
Post any codes found.
rhandwor is offline   Reply With Quote
 
Reply

POST REPLY TO THIS THREAD

Go Back   Automotive Forums .com Car Chat > Chevrolet > Blazer > Problem Diagnosis

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 Off



All times are GMT -5. The time now is 05:57 AM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts