Help! We are chasing a Start-then-stall problem
Thread Starter
Tech Contributor
Joined: Oct 2004
Posts: 1,170
Likes: 6
From: Watkins Glen NY
Help! We are chasing a Start-then-stall problem
Gentlemen,
We are chasing a problem where our 1995 LT1 starts, runs for a few seconds, and then stalls - every time.
So here might be the dumbest question of the day: Does our LT1 have a Throttle Position Interface Module? If so, where is that piece physically located? And, could it be our problem?
Thanks,
Ed LoPresti
We are chasing a problem where our 1995 LT1 starts, runs for a few seconds, and then stalls - every time.
So here might be the dumbest question of the day: Does our LT1 have a Throttle Position Interface Module? If so, where is that piece physically located? And, could it be our problem?
Thanks,
Ed LoPresti
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
Gentlemen,
We are chasing a problem where our 1995 LT1 starts, runs for a few seconds, and then stalls - every time.
So here might be the dumbest question of the day: Does our LT1 have a Throttle Position Interface Module? If so, where is that piece physically located? And, could it be our problem?
Thanks,
Ed LoPresti
We are chasing a problem where our 1995 LT1 starts, runs for a few seconds, and then stalls - every time.
So here might be the dumbest question of the day: Does our LT1 have a Throttle Position Interface Module? If so, where is that piece physically located? And, could it be our problem?
Thanks,
Ed LoPresti
Le Mans Master
Joined: Feb 2005
Posts: 6,477
Likes: 565
From: Clearwater Florida
.......... It sounds like the ECM / PCM does not realize / recognize that the engine has started ... this is , I believe a function of the ESC module to report engine speed of more than 400 rpm which tells the ECM that it should allow the fuel pump to continue to run after strart-up ... the OBD I cars have a fuel pump checking pin in the ALDL that you could jumper or just hot-wire the fuel pump at the relay to see if this is your problem ...............
.......... If that's not it , I would look at the Air fuel ratio ... it may not be able to run due to a too rich or too lean condition after start ...........
.......... If that's not it , I would look at the Air fuel ratio ... it may not be able to run due to a too rich or too lean condition after start ...........
Last edited by C409; Mar 15, 2011 at 09:12 AM.
Thread Starter
Tech Contributor
Joined: Oct 2004
Posts: 1,170
Likes: 6
From: Watkins Glen NY
Steve,
Thanks for the ether squirt suggestion. We'll give that a try next.
--------------------------
Robert,
We have jumpered the fuel pump, and that has not solved the problem.
Have not yet checked the Air/Fuel ratio. Will put that on the immediate list. Thanks.
-------------------------
Paul,
Manipluation of the throttle has no effect. It can not be "coaxed" into remaining running, and dies no matter what. I am hoping you have a couple further ideas, pending this answer.?.?
Thank you, Gentlemen!
Ed
Thanks for the ether squirt suggestion. We'll give that a try next.
--------------------------
Robert,
We have jumpered the fuel pump, and that has not solved the problem.
Have not yet checked the Air/Fuel ratio. Will put that on the immediate list. Thanks.
-------------------------
Paul,
Manipluation of the throttle has no effect. It can not be "coaxed" into remaining running, and dies no matter what. I am hoping you have a couple further ideas, pending this answer.?.?
Thank you, Gentlemen!
Ed
Melting Slicks
Joined: Sep 2003
Posts: 2,270
Likes: 118
From: N. Babylon NY
Hi Ed,
I had a similar problem with my 92. If first started out at higher RPMs-then would only start and stall. It turned out to be my fuel pressure reg. I am not sure but I think it may be similar on your year. A simple check would be to pull the vacume line and check for fuel or a smell of fuel.
I understand that there are many things that can cause this-so Good Luck!! Let us know how you make out.
Steve
I had a similar problem with my 92. If first started out at higher RPMs-then would only start and stall. It turned out to be my fuel pressure reg. I am not sure but I think it may be similar on your year. A simple check would be to pull the vacume line and check for fuel or a smell of fuel.
I understand that there are many things that can cause this-so Good Luck!! Let us know how you make out.
Steve
Thread Starter
Tech Contributor
Joined: Oct 2004
Posts: 1,170
Likes: 6
From: Watkins Glen NY
Thanks,
Ed
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