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-   -   98 z71 bucks hiccups (https://chevroletforum.com/forum/silverado-fullsize-pick-ups-21/98-z71-bucks-hiccups-66845/)

cstephan5 July 21st, 2014 9:20 AM
98 z71 bucks hiccups
 
i have a 98 z71, bucks or hiccups cruising down hwy, had trans. checked,changed plugs,wires,dist cap & rotor,crankshaft sensor,fuel filter. used seafoam in gas, fuel pressure ok at 55-60 psi. linear egr valve is questionable. any thots?


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