Quote:
Originally Posted by HeavyChevy81
Ive seen a no start issue with 50-52 static, but really figure you have enough. But, Vortecs seem to be very picky on fuel pressure for starting issues. Im thinking you are looking at a new fuel pump, even though pressures are very close to being in spec. Hard call, I think you are on the right path replacing the regulator, but Im thinking the pump is next. Im curious to the board, why are Vortecs so picky on fuel pressure? And it seems if outside specs, it just wont start, or even try?
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Vortec I own has Plastic upper intake plenum covering a single spider with the fuel injectors as a single unit. The plenum also has vaccum holes that require weird sized o rings. The Spider is generally the no start issue if there is Pressure for the fuel line. Bad design.
P0300 most common, GM answer in the Technical Bulletin states use top tier gas. DO NOT use injector cleaner as the plastic is adversely effected (yes plastic injectors)