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Engine surges!

Discussion in '6.5L Diesels' started by spent fuel1, Aug 17, 2019.

  1. spent fuel1

    spent fuel1 Registered User

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    1999 6.5 K3500 New a/c delco injectors 5000 miles ago. Injection pump 50,000 miles has 1 to 4 psi fuel press. No check engine light. Starts fine. Surges real bad above 2000 rpm. Very low on power. Fuel filter clean. Any suggestions would be greatly appreciated.

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  2. 79jasper

    79jasper Chickenhawk

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    What has been done with the pmd?

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  3. spent fuel1

    spent fuel1 Registered User

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    Has been relocated to fender well on heat exchanger.

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  4. 79jasper

    79jasper Chickenhawk

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    Do you have another pmd you could swap out to test?
    You may look at the apps as well. Use a voltmeter and see if it has a smooth increase.

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  5. spent fuel1

    spent fuel1 Registered User

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    I tried my spare pmd. Same issue. Thinking I might try running a temp fuel line to pick up tube in fuel filter housing and trying to gravity feed as a test. Maybe I'm drawing in air at higher speed than idle? Fuel lines?

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  6. 79jasper

    79jasper Chickenhawk

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    Anything is possible.
    Is that fuel pressure under load? Or idle and revving?

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  7. spent fuel1

    spent fuel1 Registered User

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    Approximately 4 on idle and 1 - 1 1/2 under load.

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