1994 GMC SIERRRA HAVE FUEL AND FIRE WILL NOT START RAN FINE PARKED FOR 1 WEEK NOW WONT START

Asked by Jan 04, 2016 at 08:13 PM about the 1994 GMC Sierra 1500 C1500 SL Standard Cab LB

Question type: Maintenance & Repair

HAS THE 4.3 V6 VORTEC ENGINE

5 Answers

71,325

Still may be a fuel issue. The 4.3 notorious for injectors, spider lines, & regulator leak. If any one of these are detected, it is recommended to replace all as an assembly. So you need to do a fuel bleed down test with a fuel pressure gage. Fuel pressure should be 56 to 63 lbs. With the pressure gauge hooked up in line, cycle the key several times to build up the fuel pressure. Then with the key off, watch the pressure gauge. It should not drop more than 5 lbs. in 3 minutes from the last pressure. If so, and the fuel pressure itself is good, replace as described..

1 of 1 people found this helpful.

SHOULD HAVE ADDED THAT IN I ALREADY DID FUEL PRESSURE AND BLEED DOWN TEST STILL NOTHING

71,325

You have spark and fuel, so the next thing to do is check the compression.

20

mine did the same and it was the crank sensor. not sure thats what it is though on yours

20

wait nvm mine didnt have fire

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