1992 GMC Sonoma no fuel or spark

1992 GMC SONOMA
158,000 MILES • 4.3L • 6 CYL • 2WD • AUTOMATIC
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GIZNOT
  • MEMBER
  • 2 POSTS
Have a tbi engine. On way home felt like engine ut out. Let off gas and it came back for a minute. Got home and found just one injector spraying. Switched wires from left injector to right and it sprayed so I knew injectors good. Replaced injector pigtail. Same result. Replaced fuel pump relay. Same result. Replaced ECM and now I jave no spark and no fuel from either injector. Fuses all checked good I just have no idea where to go next. Also changed was theEGR valve, plugs, wires, cap and rotor. Please help thanks.
Feb 12, 2014 at 6:36 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
scan for codes first. cross A&B on aldl to get check engine light to give codes.
Feb 13, 2014 at 6:35 AM
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GIZNOT
  • MEMBER
  • 2 POSTS
I scanned for codes and the only one that comes up is 12. No others pop up
Feb 13, 2014 at 1:49 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
check fuel pressure with a gauge you will need an adapter auto parts rent them 9-11 psi. then check to seeif the wires leading to the tbi unit are broken and that your ignition system is in good order if it's not the tbi doesn't work right.
Feb 13, 2014 at 4:13 PM
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