Help!! ECM Problem?
Thread Starter
3rd Gear
Joined: Aug 2002
Posts: 3
Likes: 0
From: Safety Harbor Florida
Help!! ECM Problem?
My '91, 6-spd only starts cleanly about 2 out of 5 times. Years ago was diagnosed as bad computer (ECM?), was replaced, and only helped for a while. Is real bad again. Rest of electrical system checks out, just had alternator installed. 3 out of 5 times will not run, or will idle >600 rpm, then die. Have to turn ignition totally off to take another try at starting. When starts clean runs perfectly for the balance of cycle. Anyone have an idea on this one, car has 32K miles on it, only driven occasionally. :confused: [IMG
Drifting
Joined: Mar 2001
Posts: 1,636
Likes: 3
From: Lafayette IN
Re: Help!! ECM Problem? (lancesomers)
or will idle >600 rpm, then die.
Just sounds like a problem with the ignition and the distributor pulse (pickup coil, EST module, etc). When you check codes, do you at least get a code 12?
Safety Car
Joined: Feb 2001
Posts: 4,397
Likes: 0
From: Looks like I picked the wrong week to stop sniffin glue Orlando
Re: Help!! ECM Problem? (lancesomers)
Welcome to the forum, you’ll find a lot of good info here. Check over on the ECM/Tuning forum for more info.
Iv found that these cars are almost impossible to work on without a factory service manual and the Craig Moates software, but if it does work for ya, might be a nice gesture to make a donation to Craig via PayPal.
You’ll need a laptop running Win98, and custom built cable. I can’t remember the guys name that builds the cables, but this info should be readily available in the ECM section. The software is free and the cable is about 100 dollars. If you ask me it’s the best investment money can buy if you’re going to work on the Vette yourself.
:cheers:
Iv found that these cars are almost impossible to work on without a factory service manual and the Craig Moates software, but if it does work for ya, might be a nice gesture to make a donation to Craig via PayPal.
You’ll need a laptop running Win98, and custom built cable. I can’t remember the guys name that builds the cables, but this info should be readily available in the ECM section. The software is free and the cable is about 100 dollars. If you ask me it’s the best investment money can buy if you’re going to work on the Vette yourself.
:cheers:
Thread Starter
3rd Gear
Joined: Aug 2002
Posts: 3
Likes: 0
From: Safety Harbor Florida
Re: Help!! ECM Problem? (HighHopes85)
Thanks, your description of the issue sounds like my problem, I am thinking that the distributor part (EST) was what was previously replaced and not the ECM; I don't recall for sure, will have to check the receipts. Thanks again, I will follow up based on your info.
Lance Somers
Lance Somers
Thread Starter
3rd Gear
Joined: Aug 2002
Posts: 3
Likes: 0
From: Safety Harbor Florida
Re: Help!! ECM Problem? (IBEAM700)
That info sounds interesting, but I'm the last guy I want wrenching on my Vette; but will get the info under the nose of my mechanic!!
Lance Somers
Lance Somers
