Ihave a 1990 suburban with a 350 it cranks but will not start there is no spark and the jets on the throtle body are not spraying fuel. The pump in the tank does engage when you turn the key anything would help thank you.

 

Have you tried dribbling fuel into the throttle body? This would rule out air and spark if it starts when dribbling fuel into the TB... If you find that it is a fuel issue, then you will probably have to test the fuel pressure. Should be somewhere around 10-15psi for a TBI motor. If you do not have fuel pressure, that would lead me to believe the filter is clogged or the pump is failing (even though you hear it). If you have pressure, then I would inspect the wiring harness for the injectors closely for breaks in the wires.

 

yes i have tryed puting fuel directly into the throtle body. nothing it dosent even couph or try to start but theres no spark at all nohting directly from the coil or from the distributer. i was wondering if there was a relay, main fuse, fuse link or control module that would control both fuel and spark. Is there an in-line fuel pump on this truck. it ran fine the night before.

 

Any ideas? I'm having same problem.

 

No Ideas ? Darn I'm having the same problem with a 89 S15, pulling out my hair trying to figure this one out.