I need help with my 1990 k5 blazer 5.7 350 it's will start up run ruff and have to pump the gas when idling then about 4 mins later it starts to idle higher and higher then dies

Asked by olblue1991k5 Jan 30, 2016 at 07:13 AM about the 1990 Chevrolet Blazer Silverado 2-Door 4WD

Question type: Maintenance & Repair

I need help with my 1990 k5 blazer 5.7 350 it's will
start up run ruff and have to pump the gas when
idling then about 4 mins later it starts to idle higher
and higher then dies so I try and start it back up
but it won't run its getting gas and spark I don't
have anything to test the pressure on anything but
I got a new fuel filter and plugs, plug wires ,cap
,rotor Im thinking it might be the knock sensor or
egr

GuruTLGP2 answered 6 years ago

Checked every vacuum line no leaks replace fuel pump it had no pressure on the fuel rail still has no pressure on the fuel rail. And it has no fire

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I need help with my 1990 k5 blazer 5.7 350 it's will start up run ruff and have to pump the gas when idling then about 4 mins later it starts to idle higher and higher then dies 1 Answer

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