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GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have a 1997 Chevrolet C-20 3/4 ton pickup with a 7.4L

Customer Question

I have a 1997 Chevrolet C-20 3/4 ton pickup with a 7.4L engine. It will start for only a second but dies immediately. Fuel pressure is 57lbs. Fuel filter replaced.
Submitted: 7 months ago.
Category: Chevy
Expert:  david craig replied 7 months ago.

Hi Im David, thanks for using the site. doesa the security light go out when starting?

Customer: replied 7 months ago.
Security light does go out when starting
Expert:  david craig replied 7 months ago.

ok, good at least the immobilizer isnt activated.

Expert:  david craig replied 7 months ago.

its a c-20?

Expert:  david craig replied 7 months ago.

check pulse to the injectors.

Customer: replied 7 months ago.
electrical pulse?
Expert:  david craig replied 7 months ago.

yes. do you have a noid light set?

Expert:  david craig replied 7 months ago.

hello??

Customer: replied 7 months ago.
Sorry to be so slow. Thank you for your kind patience. I am not a professional mechanic but I have done this type of work in years past.This is my personal vehicle and I can only work on it during lunch or evenings. Prior to this problem there was a short in one of the two 10 gauge primary power wires coming from the main buss under the hood. It ran fine but many of the accessories did not work. I found the shorted wire and abandoned it in the wiring loom and ran a new wire. all accessories began working again but the pick up will not run. It starts for about a second and dies. Is there something in the wire loom that the shorted wire could have damaged that might have caused this problem? I'm scratching my head on this one.
Expert:  david craig replied 7 months ago.

with out see the truck, i cant answer that. back to my question though, are you getting injector pulse while cranking the engine?

Customer: replied 7 months ago.
I am trying to find a set of noid lights now to test them.
Expert:  david craig replied 7 months ago.

ok

Expert:  david craig replied 7 months ago.

any luck finding the noids?

Expert:  david craig replied 7 months ago.

do you still need assistance?

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