98 2500 low fuel pressure
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CF Beginner
Joined: Nov 2017
Posts: 1
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98 2500 low fuel pressure
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I have a 98 2500 5.7 vortec. It just stopped running, won't start. I replaced fuel pump, relay, and filter. Still won't start, tested fuel pressure and got 38 psi while cranking, and 42 at rest. Any guesseson why the pressure is so low? Thank you
I have a 98 2500 5.7 vortec. It just stopped running, won't start. I replaced fuel pump, relay, and filter. Still won't start, tested fuel pressure and got 38 psi while cranking, and 42 at rest. Any guesseson why the pressure is so low? Thank you
CF Monarch
Joined: Oct 2017
Posts: 4,605
Likes: 269
From: USA
More then likely you have a bad MAP sensor, which if correct, is easier then installing another fuel pump.