CHEVROLET SUBURBAN FUSE PROBLEM
2003 Chevrolet Suburban • 170,000 miles
Ran fine , went in store and when I came out car started but ran rough for a minute then died . I listened for fuel pump and it didn't come on . I replaced the pump and filter and still won't start . I borrowed a code reader and it had p0300 . Rented a fuel pressure gauge and it didn't register any pressure . I hooked it up before and after the fuel filter with no reading but when I unhooked the fuel lines fuel comes out at a decent rate . I checked fuses and grounds and all were good . When I try and look online there is a dozen things people say it could be . I'm looking for a priority order of things it could be . Any help is greatly appreciated . Thank you in advance .
Check for power to the pump. the original pump may have blown the fuse as well.
Thanks for the response . there is power to the pump , I haven't checked with a meter but it pumps fuel up to the pressure regulator but dies after a few seconds .
What is the exact pressure??
It registered zero on the gauge . When hooked up to the pressure relief valve it won't jump up to 5 psi when cracking the key but fall back to zero after a second but what confuses me is fuel would pump out if I unhooked the line .
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