24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps
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ENGINE SURGING 50-200 RPM

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Old 03-12-2019, 07:14 PM
BOOTLEG012500's Avatar
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Default ENGINE SURGING 50-200 RPM

Hey guys need some help diagnosing an issue! I have an 01 2500 Cummins with 88k on it and just recently I have been experiencing some motor surging it doesnít lag but surges at random between 50-200 rpm when itís at speed on the highway, sometimes while Iím accelerating but not stomping on the pedal to get up to speed. Itís mostly when Iím kind of light on the throttle or holding speed on the highway. The weird part is I can let off the pedal and then stomp on it and it revs up fine. My psi gauge never drops below 10 wot and it shows steady pressure when the surging happens. Iíve got about 3500 miles on a new fuel filter as well as an airtex lift pump mounted at the factory spot on the motor. I have a big line kit from the end of the lift pump to filter and to injection pump. I canít find any leaks or anything loose. Anybody got any ideas????? Iím at a loss and donít wanna burn up the injection pump.
 

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