does 1999 k1500 have spider injectors. i have a "VORTECH" 5700 SFI engine.
when truck sits it loses fuel system prime. truck runs smooth, fuel delivery is constant at
high speeds, terrible gas mileage,
http://troubleshootmyvehicle.com/gm/4.3L-5.0L-5.7L/testing-the-spider- fuel-injector-1 --- check this out it might help
My '03 S-10 does the same thing. I've been told it's the fuel pump. Haven't replaced it yet to see. But apparently there's a ball bearing that is supposed to roll back when the truck is shut off to prevent fuel system pressure loss. HTH. -Jim
Vortec motors have afuel pressure regulator under plastic intake.itcan leak fuel intocrank case and cause serious internal engine problems
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