diagnostic. help

CFD · 05-23-2014, 05:18 AM

Here's the issue. Custom built roadster with an ecm from a 2002 vette. Car ran perfect,sat for several months and battery went dead. Jumped it started and ran fine, drove a short distance shut it off. Needed to be jumped again, car now starts, runs for a second or two and dies. Any thoughts?

Mikes fast ss · 05-23-2014, 05:27 AM

Sounds like the alternator or the battery is shot.

CFD · 05-23-2014, 05:34 AM

Quote:

Originally Posted by Mikes fast ss

Sounds like the alternator or the battery is shot.

The battery has been replaced and the system is charging. The car starts fine but dies , the injectors run dry ,feels like a theft deterent.

Mikes fast ss · 05-23-2014, 05:42 AM

Hmmm, maybe. Once the car is dead for a while it def could be. Beats me.

Gd luck George.

CFD · 05-23-2014, 05:48 AM

Quote:

Originally Posted by Mikes fast ss

Hmmm, maybe. Once the car is dead for a while it def could be. Beats me.

Gd luck George.

Thanks, if it is an anti-theft issue how would you reset it?

heymatt · 05-23-2014, 06:17 AM

Fuel pump issues? Clogged fuel filter?

CFD · 05-23-2014, 06:33 AM

Quote:

Originally Posted by heymatt

Fuel pump issues? Clogged fuel filter?

Fuel system is new and clean. Fuel pump is working properly

Scalded Dog · 05-23-2014, 12:04 PM

Just happened to see this... by chance, the OP is discussing a similar issue with Corvette. There are a number of suggestions in the thread, some of which haven't been suggested in THIS thread.. maybe you'll find it there?

http://forums.corvetteforum.com/c5-t...-off-help.html

derklug · 05-23-2014, 11:13 PM

If you have an anti theft problem, you can reset the system by following this procedure.
1. Turn key on and try to start, leave key on for ten minutes or untill the anti-theft light goes out
2. Turn key off for ten seconds.
3. Turn key on but do not start. Leave key on for ten minutes or untill the theft light goes out. Repeat 2 and 3.
4. Turn key off for ten seconds and then try to start the engine.

This will work on most GM vehicles, but I can't guarantee it will work on your set-up. Before starting the relearn process, hook up a battery charger. If the battery goes dead while in relearn, you will have to start over.

CFD · 05-24-2014, 04:16 AM

Quote:

Originally Posted by derklug

If you have an anti theft problem, you can reset the system by following this procedure.
1. Turn key on and try to start, leave key on for ten minutes or untill the anti-theft light goes out
2. Turn key off for ten seconds.
3. Turn key on but do not start. Leave key on for ten minutes or untill the theft light goes out. Repeat 2 and 3.
4. Turn key off for ten seconds and then try to start the engine.

This will work on most GM vehicles, but I can't guarantee it will work on your set-up. Before starting the relearn process, hook up a battery charger. If the battery goes dead while in relearn, you will have to start over.

Thanks, I'll have them try it and see what happens.

mickss · 05-24-2014, 08:42 AM

If it is the anti-theft system and by your description it seems like it is, you could always eliminate that portion of the system using the following unless you want to keep the anti-theft system;
http://newrockies.com/

I`ve used this system when I did and engine and ECM swap and have not had any issue for almost 2 years. If you do use this system, buy the USA module not the Chinese module, Their probably both good, I just have a problem with trusting inexpensive labor but then again paying top dollar isn`t always a guarantee of quality either.

Good luck, I hope it something simple and inexpensive.

CFD · 05-30-2014, 08:34 PM

Figured I'd update this. The ECM used has the antitheft function disabled. The ECM was sent back to the vendor and they think that when the car was jumped it damaged the unit as it tests bad. They are sending a new one to install.

05-23-2014, 05:18 AM	#1
CFD Drives: 2SS/RS L99 BLACK Join Date: Apr 2010 Location: Franklin , MA Posts: 6,696	diagnostic. help Here's the issue. Custom built roadster with an ecm from a 2002 vette. Car ran perfect,sat for several months and battery went dead. Jumped it started and ran fine, drove a short distance shut it off. Needed to be jumped again, car now starts, runs for a second or two and dies. Any thoughts?

05-23-2014, 06:17 AM	#6
heymatt Drives: 2012 IBM 2SS Vert. Join Date: Dec 2011 Location: Tequesta, Fl. Posts: 784	Fuel pump issues? Clogged fuel filter? __________________ LS3/M6 K&N, VMAX throttle body, RX Catch Can, skip shift eliminator, DT shorties and Solo HFC, DRL harness and 5K LED DRL, ZL1 rear sway, 1LE front sway

05-23-2014, 11:13 PM	#9
derklug Drives: 12 Boss 302 Join Date: Sep 2009 Location: Grand Rapids, Mi Posts: 1,369	If you have an anti theft problem, you can reset the system by following this procedure. 1. Turn key on and try to start, leave key on for ten minutes or untill the anti-theft light goes out 2. Turn key off for ten seconds. 3. Turn key on but do not start. Leave key on for ten minutes or untill the theft light goes out. Repeat 2 and 3. 4. Turn key off for ten seconds and then try to start the engine. This will work on most GM vehicles, but I can't guarantee it will work on your set-up. Before starting the relearn process, hook up a battery charger. If the battery goes dead while in relearn, you will have to start over. __________________ The biggest mistakes in life come when you know exactly what you are doing.

05-23-2014, 05:27 AM	#2
Mikes fast ss Slowhawk Built Drives: 2010 Supercharged SS Join Date: Apr 2014 Location: CT Posts: 819	Sounds like the alternator or the battery is shot.

05-23-2014, 05:42 AM	#4
Mikes fast ss Slowhawk Built Drives: 2010 Supercharged SS Join Date: Apr 2014 Location: CT Posts: 819	Hmmm, maybe. Once the car is dead for a while it def could be. Beats me. Gd luck George.

05-23-2014, 12:04 PM	#8
Scalded Dog Drives: 2011 1LT Join Date: Mar 2012 Location: Crestline, CA Posts: 3,029	Just happened to see this... by chance, the OP is discussing a similar issue with Corvette. There are a number of suggestions in the thread, some of which haven't been suggested in THIS thread.. maybe you'll find it there? http://forums.corvetteforum.com/c5-t...-off-help.html

05-24-2014, 08:42 AM	#11
mickss Drives: 2010 Camaro LS-M6 67 Chevelle Wgn Join Date: May 2009 Location: . Posts: 1,509 View My Garage	If it is the anti-theft system and by your description it seems like it is, you could always eliminate that portion of the system using the following unless you want to keep the anti-theft system; http://newrockies.com/ I`ve used this system when I did and engine and ECM swap and have not had any issue for almost 2 years. If you do use this system, buy the USA module not the Chinese module, Their probably both good, I just have a problem with trusting inexpensive labor but then again paying top dollar isn`t always a guarantee of quality either. Good luck, I hope it something simple and inexpensive.

05-30-2014, 08:34 PM	#12
CFD Drives: 2SS/RS L99 BLACK Join Date: Apr 2010 Location: Franklin , MA Posts: 6,696	Figured I'd update this. The ECM used has the antitheft function disabled. The ECM was sent back to the vendor and they think that when the car was jumped it damaged the unit as it tests bad. They are sending a new one to install.