Engine surges!

[spent fuel1]

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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[79jasper]

What has been done with the pmd?

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[spent fuel1]

Has been relocated to fender well on heat exchanger.

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[79jasper]

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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[spent fuel1]

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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[79jasper]

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

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[spent fuel1]

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

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