Fuel injectors not spraying. How do I check them?

Asked by Jun 08, 2016 at 10:08 PM about the 1993 GMC Suburban K1500 4WD

Question type: Maintenance & Repair

Was running just fine. Stop shut it off went in store and when I came out it
started then died when put in to gear.  Now I have fuel going to injectors, but
not spraying. I have TBI on 5.7l motor.

4 Answers


Did you check fuel pump pressure, is it at the needed amount and does stay there for awhile?

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Also u can rent a noid tester to see if electrical pulse is being sent to them to operate.

Haven't used noid tester yet, but I have 12.20 volts going to the connectors. Would that be right? 12.20 volts or should it fluctuate with a pulse?


I'm not really sure of actual voltage, although I don't think its that high. The idea is it even receiving voltage, noid tester will tell u that. But again check gas pressure too.

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