Fuel injectors not spraying. How do I check them?

Benjamin Granger

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?

Best Answer

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

Benjamin Granger

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.

Your Answer

Add photo

Related Questions


Looking for a Used Suburban in your area?

CarGurus has 219 nationwide Suburban listings starting at $1,595.


Search GMC Suburban Questions

GMC Suburban Experts

#1 LouB
Reputation 1,160
#2 Larry Thibert
Larry Thibert
Reputation 170
#3 tennisshoes
Reputation 150
View All

Related Models For Sale

Used Chevrolet Suburban"
677 Great Deals out of 24,305 listings starting at $1,985
Used GMC Yukon"
566 Great Deals out of 14,734 listings starting at $1,500
Used GMC Sierra 1500"
1,054 Great Deals out of 56,538 listings starting at $2,300
Used Ford Explorer"
1,396 Great Deals out of 72,124 listings starting at $300