why do i have to spray gas in the throttle to crank it I a new air control valve I put throttle position sensor do you have to spray gas to crank it it want crank by itself help me

Asked by Feb 07, 2016 at 09:57 AM about the 1994 GMC Sierra 1500 C1500 SL Extended Cab SB

Question type: Maintenance & Repair

1 Answer

58,535

You need to verify fuel pressure. This could be either a fuel pump or leaky injectors, spider lines, and fuel regulator. Fuel pressure should be 56 to 63 lbs. Putting gas in threw the throttle body and it fires up is a dead giveaway.

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