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#1
09-21-2026, 10:18 PM
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2000 chevy silverado 4.8 vortec
Hello I have a 2000 Chevy 4.8, one day I lost tachometer and pegged out fuel guage along with harsh shifting, it will not run with egr plugged in, things I’ve changed… new egr valve, new battery, replaced all grounds, new fuel filter, Maf, crankshaft sensor, it will start and idle only with egr valve disconnected.
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#2
10-05-2026, 10:49 AM
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Re: 2000 chevy silverado 4.8 vortec
It sounds as if the PCM is commanding the EGR open. If two different EGR valves do that, it is probably not the valve at fault.
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#3
10-13-2026, 07:52 PM
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Re: 2000 chevy silverado 4.8 vortec
Quote:
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1988 9C1 - Modified LM1 @ 275HP/350TQ - TH700R4 - 3.08 8.5" Disc Rear - see it at http://www.silicon212.org/9c1! 2005 Crown Vic P71 - former AZ DPS - 4.6 liters of pure creamy slothness! 1967 El Camino L79/M20 old school asphalt raper Remember - a government that is strong enough to give you everything you need, is also strong enough to take everything you have.
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