Question about 1998 GMC Sierra

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1998 gmc 4.3 starts up but loses power 3-5 mins later,will restart and run again for another short time,fuel filter has just been replaced.

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1998 gmc 1 ton 6 cyl. new wires, plugs, fuel filter, cap and rotor.
i still dont have any power whi i start to drive.
idle great, quit, engin revs up well. problem is in gear and starting to drive seems like it bogs down.
thank you
mat

Posted on Mar 17, 2009

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Install a pressure gauge, start and run 3-5 minutes and watch the pressure. You should see the pressure maintain as it did when first started. If it begins to drop, the fuel pump has gotten weak and is starting to fail.
Let me know what you find.
Regards.

Posted on Mar 05, 2009

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