My ECM over-heated!!
Thread Starter
Senior Member
Joined: Jan 2002
Posts: 812
Likes: 0
From: Red Deer, Canada
Car: 89 Shortbox
Engine: 350 Vortec
Transmission: 700r4
My ECM over-heated!!
I went to start the motor, and it went into limp-mode right away, I tried everything to fix it - with no sucsess. I opened my glove box (which happens to be black , along the rest of my interior) and the ECM was to hot to touch, from the sunlight. So I stuck it in the freezer for 10 min, and everything was fine after that.
Just wondering if this has happened to anyone else, also I can't figure out why it wouldn't work when its really hot.
Just wondering if this has happened to anyone else, also I can't figure out why it wouldn't work when its really hot.
Supreme Member

Joined: Feb 2000
Posts: 1,416
Likes: 0
From: Johnstown, Ohio
Car: 84 Z28
Engine: 355 (fastburn heads, LT4 HOT cam)
Transmission: 700R4
Axle/Gears: 9-bolt, 3.27
That's a common failure of an ECM. When I used to work at a dealership, I had replaced many ECM's because of this. What I believe to be the problem is that the heat causes things to expand, and some things break connection.
Supreme Member
Joined: Jun 2000
Posts: 7,554
Likes: 1
From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Re: My ECM over-heated!!
Originally posted by Low C1500
I went to start the motor, and it went into limp-mode right away, I tried everything to fix it - with no sucsess. I opened my glove box (which happens to be black , along the rest of my interior) and the ECM was to hot to touch, from the sunlight. So I stuck it in the freezer for 10 min, and everything was fine after that.
Just wondering if this has happened to anyone else, also I can't figure out why it wouldn't work when its really hot.
I went to start the motor, and it went into limp-mode right away, I tried everything to fix it - with no sucsess. I opened my glove box (which happens to be black , along the rest of my interior) and the ECM was to hot to touch, from the sunlight. So I stuck it in the freezer for 10 min, and everything was fine after that.
Just wondering if this has happened to anyone else, also I can't figure out why it wouldn't work when its really hot.
In the ecms I've tested to distruction none of them healed after overheating them. Once they were used, again and again the temps always lowered to where they would act up.
Generally it's the injector drivers that fail first.
Thread
Thread Starter
Forum
Replies
Last Post
efiguy
Engine/Drivetrain/Suspension Parts for Sale
0
Sep 27, 2015 01:30 PM




