01 cummins surging intermittenly - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!

Cummins Turbo Diesel Repair and performance for the Dodge Cummins Turbo Diesels.

 
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post #1 of 5 Old 10-13-2018, 03:52 PM Thread Starter
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01 cummins surging intermittenly

I have a 01 ram 2500 cummins with auto transmission I got it about a year ago and ever since I got it would randomly surge usually just while maintaining speeds like around 45mph or in the city and when I turn off overdrive it would help but now it's beginning to get worse I have checked all the grounds, put a BD noise filter on it and that helped a little bit but when it's surging sometimes it tries to change gears kinda like it's confused and if I put it in first gear it won't do it at all wondering if I should try to re-calibrate the TPS sensor, would anybody know what it might be? thanks
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post #2 of 5 Old 10-15-2018, 11:39 AM
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Re: 01 cummins surging intermittenly

Assuming you have a fuel pressure gage and a snubber inline, what's that reading at idle and when the surging begins?
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post #3 of 5 Old 10-15-2018, 02:37 PM Thread Starter
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Re: 01 cummins surging intermittenly

Yes I have a edge juice with attitude that I installed and a Fass Titanium Pump and it always reads 14-15 psi at idle and it never goes below 13psi and when it surges the fuel pressure doesn't change and there doesn't seem to be a rhyme or reason why it surges other than when you are idling along basically with no load or very light load
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post #4 of 5 Old 10-15-2018, 03:28 PM
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Re: 01 cummins surging intermittenly

Copied from another forum, but totally true: "Cummins' specs are are 17 - 22 psi at idle and 25 - 35 psi at 2500 rpm (no load)"

From what I see about 18 idle and 25+ is expected.

Here's an option if you have good lines to the lift pump and currently have a stock pump: https://powerdrivendiesel.com/produc...ied-lift-pump/

Did you try pinching off the fuel return line to see if the pressure rises yet?
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post #5 of 5 Old 10-15-2018, 07:00 PM Thread Starter
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Re: 01 cummins surging intermittenly

I don't think that it's a fuel pressure issue all the research I have done and people I have spoke to (mechanics) say as long as you have over 10psi and above 5psi when at full throttle under load and I have no less then 12psi when under load at full throttle the surging seems to be more related to the transmission/torque converter like it's trying to lock up and unlock and it's better when I turn off the over drive and won't do it at all if I put it into 1st gear and if I step on the throttle it doesn't do it just at certain rpm ranges basically just above idle
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