starts but dies immediately - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HTX86chevy · 05-20-2019, 02:14 PM

5.3 DBW and 4l60e into 72 c10 with Factory tank.

This is my 1st time doing an LS swap.
reworked harness myself using guide from (Brenden/Lt1swap.com)
had PCM done by Brenden also.

walbro 255 inline fuel pump

I have added grounds like crazy including 1 to PCM case

I have swapped fuel regulator 3 times and seem to be getting only 52psi on gauge

when I engage the key, I can hear the fuel pump run and stop after a few seconds. I turn the key to on and the engine cranks, starts and dies after 2-3 seconds. no sputtering or anything, just cuts off.

I don't have the OBD port wired up yet.

Any Ideas? what should be my next step?

05-20-2019, 02:14 PM	#1
HTX86chevy Registered User Join Date: Feb 2010 Location: Houston, Tx Posts: 349	starts but dies immediately 5.3 DBW and 4l60e into 72 c10 with Factory tank. This is my 1st time doing an LS swap. reworked harness myself using guide from (Brenden/Lt1swap.com) had PCM done by Brenden also. walbro 255 inline fuel pump I have added grounds like crazy including 1 to PCM case I have swapped fuel regulator 3 times and seem to be getting only 52psi on gauge when I engage the key, I can hear the fuel pump run and stop after a few seconds. I turn the key to on and the engine cranks, starts and dies after 2-3 seconds. no sputtering or anything, just cuts off. I don't have the OBD port wired up yet. Any Ideas? what should be my next step? __________________



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