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- - Help!!!!!! (https://chevroletforum.com/forum/silverado-sierra-fullsize-pick-ups-21/help-42083/)

bill4169

Apr 26, 2011 6:35 AM

Help!!!!!!

I have a 97 K1500 with a 5.7. the other day the truck started missing and lost power. I changed the fuel filter, cap and rotor. Still no better. It idles fine soon as you step on the gas it bogs down and backfires through the intake and exahust. I checked the tps and the idle control both are ok. Also I checked the fuel pressure and its 60psi. any help would be great

OLD WRENCH

Apr 26, 2011 9:59 AM

How old are the plug wires?

bill4169

Apr 26, 2011 10:25 AM

The plugs and the wires have about 3 thousand miles on them.

Hunt4X4

Apr 26, 2011 5:26 PM

how many miles does the truck have? could be plugged fuel injectors

BAGnDRAG-K5

Apr 26, 2011 5:42 PM

How exactly did you check the TPS and the IAC sensors?

Big Chuk

Apr 26, 2011 6:36 PM

Sounds alot like like a plugged Catalytic Convertor.

bill4169

Apr 26, 2011 7:51 PM

I think I found the problem. I went back to the fuel pressure and tested it again. I had the truck running and after a couple of minutes it droped to about 20psi than when I hit the gas it went to almost zero.

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