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Discussion Starter · #1 ·
Have a 98 C3500 2WD, 5.7L. Purchased vehicle a month ago. Drove it down from Michigan to North Carolina and it ran great. Has 56K. Last weekend went to start and it would just crank and not start. Has plenty of fuel. Did not pop any DTC codes. I put new fuel filter on. I hear fuel pump cycling. But, when I put fuel pressure gage, I get no reading. So, I double check my gage on another vehicle and it is working fine. Prior to connecting fuel filter, I cycled fuel pump and it put out like a fire hydrant. So, I then I suspect a blockage in fuel line from filter to throttle body. I remove Schrader valve and clean and also blow air into fuel line to clean any potential blockage. All seemed clear. I am getting fuel to throttle body. But again, no pressure reading on fuel pressure gage. So I suspect that the fuel pump is pumping but not at sufficient pressure. Am I on the right track. Appreciate any help......thanx...
 

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Discussion Starter · #3 ·
I thought that, but the pressure regulator is after the the pressure check valve. So not quite sure that would be the cause. I've read here and also the service manual that a fault pressure regulator will give high or low pressure readings. Right now, I am not getting any pressure readings at the pressure check valve. Thanx for responding..............
 
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