1990 GMC Sierra won't turn over

144,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
KURPAI_02
  • MEMBER
  • 5 POSTS
I have a new distributor,dist. cap and rotor, good sparkplugs, wires, good fuel pump, but my truck will turn over but it won't start up. if it's the timing could you assist me with it? thanks
Mar 29, 2010 at 4:47 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Are you getting spark and fuel to the engine?
Apr 3, 2010 at 8:27 AM
Avatar
KURPAI_02
  • MEMBER
  • 5 POSTS
yes i am getting spark and fuel to the engine
Apr 3, 2010 at 8:53 AM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
If you have good spark and the engine is getting fuel, it should run. The only other things that could cause it not to is timing or low compression. Are you getting a good hot blue snapping spark? Also, are you sure the injectors are getting power? You could have fuel to the throttle body, but the injectors may not be working. Will it start with starting fluid? Also, as far as timing, on the harmonic balancer there is a timing mark (hard to see if dirty). Align the mark on the harmonic balancer with the iming marks on the timing chain cover that says TDC. Next, note where the number 1 spark plug wire plugs into the distributor cap. Remove the cap and the rotor should be pointing to that spot (#1). Let me know what you find. Also, let me know if it starts with starting fluid.

By the way, Happy Easter.
Joe
Apr 3, 2010 at 4:12 PM
Avatar
KURPAI_02
  • MEMBER
  • 5 POSTS
the only mark i can see on my harmonic balancer is 2 notches on it....that's all i can see
Apr 3, 2010 at 4:36 PM
Add a reply
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.

Frequently Asked Problems for This Vehicle