Starting Problem now wont start.. ECM?
Thread Starter
Racer
Joined: Jan 2010
Posts: 347
Likes: 12
From: Deltona FL
Starting Problem now wont start.. ECM?
89 Vert Stock
This is the 3rd time it has done this.....
Left for work drove about 1/4 mile stopped at the store came back out and it would not start (cranks no start).. Pop hood check wires, batt, etc fuel pump runs but no start.. 10 min later I try it again and it starts right up runs fine. Took it home rode the bike to work, Got home starts right up drive around start / stop runs fine. Next day same thing tried starting numerous times no start waited about 10 mins and it started drove to work (30 miles) after work and for the next 3 days no problems at all.
This morning 1/4 mile drive and no start had to get it towed to the garage. Mechanic hooks up computer and said no data transfer computer is not sending any signals and no security light when key is in or in the on position........ Does this sound like a bad ECM due to the intermittent starting problems? Or could it be a Vats problem?
The car runs fine when running but doesn't feel right. I'm sure there are some that know what I mean.
This is the 3rd time it has done this.....
Left for work drove about 1/4 mile stopped at the store came back out and it would not start (cranks no start).. Pop hood check wires, batt, etc fuel pump runs but no start.. 10 min later I try it again and it starts right up runs fine. Took it home rode the bike to work, Got home starts right up drive around start / stop runs fine. Next day same thing tried starting numerous times no start waited about 10 mins and it started drove to work (30 miles) after work and for the next 3 days no problems at all.
This morning 1/4 mile drive and no start had to get it towed to the garage. Mechanic hooks up computer and said no data transfer computer is not sending any signals and no security light when key is in or in the on position........ Does this sound like a bad ECM due to the intermittent starting problems? Or could it be a Vats problem?
The car runs fine when running but doesn't feel right. I'm sure there are some that know what I mean.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
VATS problems will not allow the starter motor to crank the engine so you don't have a VATS problem.
You could have an intermittent problem with the ECM or intermittent 12v power to the ECM. When it won't start, THAT is the time to start diagnosing what the problem is. I hope your mechanic is able to find the problem.
You could have an intermittent problem with the ECM or intermittent 12v power to the ECM. When it won't start, THAT is the time to start diagnosing what the problem is. I hope your mechanic is able to find the problem.
Team Owner
Joined: Jan 2003
Posts: 20,320
Likes: 248
From: Summerland B.C. Canada
I suggest you ohm test your injectors. When those Multec injectors start to fail, the lowered resistance can knock out the ECM's injector driver and possibly the ECM.
Watch Jon's vid on ohm testing.
http://forums.corvetteforum.com/c4-t...questions.html
Watch Jon's vid on ohm testing.
http://forums.corvetteforum.com/c4-t...questions.html
Advanced
Joined: Nov 2010
Posts: 77
Likes: 0
From: Richmond Kentucky
I suggest you ohm test your injectors. When those Multec injectors start to fail, the lowered resistance can knock out the ECM's injector driver and possibly the ECM.
Watch Jon's vid on ohm testing.
http://forums.corvetteforum.com/c4-t...questions.html
Watch Jon's vid on ohm testing.
http://forums.corvetteforum.com/c4-t...questions.html
My 91 was doing similar and it was 4 of 8 injectors ohmed at 4
