Truck floods when starting

Asked by May 13, 2016 at 05:33 AM about the 1991 Chevrolet C/K 1500 Standard Cab SB 4WD

Question type: Maintenance & Repair

91 gmc sierra 5.7l tbi floods when starting and has
to be floored in order to start

2 Answers

22,705

25 years later, it might need some repairs- maybe a new throttle body?

72,235

First check the fuel pressure, should be 9 to 13 lbs, and over 13 lbs when dead head checking. It may be the TBI needs to be rebuilt, fuel regulators go weak, injectors malfunction.

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