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1992 GMC Sonoma no fuel or spark

Tiny
GIZNOT
  • MEMBER
  • 1992 GMC SONOMA
  • 4.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 158,000 MILES
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.
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Wednesday, February 12th, 2014 AT 6:36 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes first. Cross A&B on aldl to get check engine light to give codes.
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Thursday, February 13th, 2014 AT 6:35 AM
Tiny
GIZNOT
  • MEMBER
  • 2 POSTS
I scanned for codes and the only one that comes up is 12. No others pop up
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Thursday, February 13th, 2014 AT 1:49 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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.
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Thursday, February 13th, 2014 AT 4:13 PM

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