Crank no start, no spark

1999 GMC JIMMY
236,000 MILES • 4.3L • 6 CYL • 4WD • AUTOMATIC
Avatar
CHRIS JOHN RICHARD SMALLPIECE
  • MEMBER
  • 1 POST
Blew an intake gasket last week. cleaned the top end of the engine then installed new gaskets, a new oil pressure sending unit, installed the intake, the upper intake, the throttle body, all the wires and hoses. got to the point of starting it but when i cranked it there it did not start. I then pulled the wire off the coil and tested it with a spark plug and no spark from coil, replaced the coil and tried again still no spark. All fuses for ECM and what not still good. Suspected the ignition switch so i ran a wire to a 15 amp fuse and wired the fuse direct to the ECM 1 fuse to the battery in order to continue power past ignition switch. still no spark. i am at a loss and about to give up and sell it.
Mar 25, 2018 at 11:19 AM
Advertisement
Avatar
KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
You are most probably going the wrong direction. No spark could be due to a fault with the drank position sensor. Have it checked, maybe the wire connector has been worked is loose due to working around the engine.
Mar 27, 2018 at 2:56 AM
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.