Go Back   CLASS RACER FORUM > Class Racer Tech > Support Tech

Thread Tools Display Modes
Old 11-11-2021, 08:14 AM   #1
Monte Howard
Monte Howard's Avatar
Join Date: Nov 2002
Location: Potomac,IL
Posts: 250
Likes: 1
Liked 40 Times in 11 Posts
Default 2001 gmc 8.1 ECM upgrade question

I have a 2001 GMC 2500 HD, the ECM isnít sending a pulse signal to the #4 injector. So I need to purchase a new ECM I am assuming. Anyone have experience upgrading the ECM on these 8.1 chevys for more performance for towing?
Monte Howard 3209 STK, 3208 SS
Monte Howard is offline   Reply With Quote
Old 02-01-2022, 07:30 PM   #2
Junior Member
Join Date: Jan 2022
Posts: 9
Likes: 13
Liked 22 Times in 6 Posts
Default Re: 2001 gmc 8.1 ECM upgrade question

You should check for continuity between the injector plug in and the corresponding pins on the ecm plug in to make sure there isn't a break in the wiring somewhere. Hate to put in a new computer and it does the same thing. Have seen a broken wire or a mouse damaged one before.
vette5148 is offline   Reply With Quote

Thread Tools
Display Modes

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

Forum Jump

All times are GMT -5. The time now is 12:58 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Copyright © Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.