engine miss

1997 PONTIAC GRAND AM
265,000 MILES • 6 CYL • FWD • AUTOMATIC
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YESROD40
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97 grand am with 3.1 engine still has a miss after changing fuel pump, fuel filter, plugs , plug wires and pcv valve. Whats next to try?
Jan 21, 2011 at 2:55 PM
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MMPRINCE4000
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Run a compression test, could be a rocker, pushrod, bent valve.
Jan 21, 2011 at 3:10 PM
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YESROD40
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It very well could be a rod. When pump went and wife was trying to start it she said she heard a "pop" up under the dash at one point.The miss got bad after I changed the fuel pump. Didn't notice it before. The car runs with power but cant cet the niss out. Its most noticable when I have foot on gas peddle. The order of cures i tried was filter, then plugs and wires, then pcv valve.
Jan 21, 2011 at 3:32 PM
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MMPRINCE4000
  • CAR REPAIR CONTRIBUTOR
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Remove valve covers and plugs, rotate engine by hand and observe rocker arms.
The "pop" could also be a pushrod.
Jan 21, 2011 at 3:40 PM
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