1994 Chevy Truck

1994 CHEVROLET TRUCK
Avatar
RAMISNER
  • MEMBER
  • 1 POST
Electrical problem
1994 Chevy Truck V8 Four Wheel Drive Automatic

I have a 1994 chevy 1500 four wheel drive. I have no injector pulse and the fuel pump is not turning on. If i direct wire the pump at the relay the pump turn on but the injectors still do not work. The pcm is good and the ecm is good as well. The relay is new along with the ignition switch, battery connections, grounds that are on the goose neck, pick up coil and everything i can think of has been checked. I have about 9 hours of diagnosis time into this thing and still nothing. any ideas?????
Oct 30, 2008 at 7:40 PM
Advertisement
Avatar
DOCFIXIT
  • ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Might want to try new ignition moudle in dist. If no 5v referance gets back to ECM it don't know you want the engine to run. ie. no pump no inj pulse.
Oct 31, 2008 at 2:22 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.