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06-19-2014, 10:35 AM
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#1 |
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Rusty Rockerfeller
 Join Date: May 2003
Location: South Georgia
Posts: 1,631
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8.1 miss
2001 GMC 2500HD seems to want to miss when you first start it up. you can feel almost a dead miss but seems to clear up after reving it up a few times. Installed new fuel pump and new wires with plugs? Could this be an injector? It does it everytime you shut it off for a while.
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06-22-2014, 07:06 PM
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#2 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 8.1 miss
Check the Fuel Pressure Regulator for leakage, If fuel is present in the vacuum line, Replace regulator.
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06-22-2014, 09:20 PM
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#3 |
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Registered User
Join Date: Oct 2009
Location: .
Posts: 2,187
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Re: 8.1 miss
It could also be an injector that is partially stuck open. Both fpr and leaking injectors are very common on the 7.4. I'm not sure if the 8.1 had injector issues or not.
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