ECM check or repair recommendations..

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Post Reply
gn69z28
Pro
Pro
Posts: 320
Joined: Fri Dec 28, 2007 9:33 pm
Location:

ECM check or repair recommendations..

Post by gn69z28 »

I'm still looking for the random misfire on my 2005 suburban. I've done everything I can think of and I want to get the ECM checked to see if that's the problem. Anyone have any recommendations on who to send it to that does good work and decent turn around time?
cfm
Pro
Pro
Posts: 301
Joined: Mon Feb 12, 2007 12:29 pm
Location:
Contact:

Re: ECM check or repair recommendations..

Post by cfm »

Had one weird one customers 6.0 last year that would set a random misfire only after 1hr or so on highway. I drove it several times with no issue. He was also having a driver side vent door issue where the driver side would open to full hot on it’s own. I did the reprogram vent door list and gave it back for time being. I ran into him later and said random misfire and vent issue persisted. He found something online where a person cleaned contacts on coolant temp sensor for same sort of condition and issues went a way. So he did this and lol and behold his has been fine for almost a year now. Figured i’d nention this to you in case.
gn69z28
Pro
Pro
Posts: 320
Joined: Fri Dec 28, 2007 9:33 pm
Location:

Re: ECM check or repair recommendations..

Post by gn69z28 »

Thanks. I'll certainly give that a try.
V12MECH
Member
Member
Posts: 137
Joined: Sun Jul 26, 2020 3:53 pm
Location:

Re: ECM check or repair recommendations..

Post by V12MECH »

Have not heard about the coolant sensor trick, something we do in the shop is to leave the ecm plugged in, disconnect either battery lead and jump together ,( i.e. positive to negative) leave key on,30-60 secs. this completely blanks the memory. This procedure may affect other modules, like seat and radio pre-sets. I just used this method to bring back an ecm that just shut down during a re-program, that was a close one. Will typically buy new and program.
Post Reply