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Problem with idle cut off

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Hi excuse me to disturb you, I have a 98,5 dodge ram 2500 cummins. I ve just changed my vp44 by a rebuilt, I ve changed too injector by rebuilt 75 HP, changed the 6 lines by New, 6 connectors tubes seals, the fuel filter, put transparent hose to see if there is bubbles but no, and I have a problem. The truck start good, the idle doesnt move ( like apps dead), when I accelerate the engine cut off. I restart , it restart good. Before I forget I have installed before I changed all that, a superchips cortex programmer.... I found à little leak on my new injection lines ( 1, 3 4 5) at the connection with tubes... I have no code ... I make a video to explain it... what do you think it could be.... the little leaks? The programmer? The injectors? Thank you for your help

Mopar1973Man - Note

Attention: Our new member is from overseas and their native language is French. He's using a translator app from Google. Please be clear and explain your ideas well.

Mopar1973Man - In this video he's asking about the tach dipping down but it doesn't stall.

That is strange I have no code..... I have some little leaks between the end of the injection lines, I thinked it was this produce air which go inside by here and less pressure .... but I dont understand....

This happens when the idle speed drops, sometimes it cuts the engine and sometimes not at all....

Excuse me to disturb you but I live at Monaco, and in my country there is nobody to repair this truck. I ve just changed the vp44 I bought at Rockauto.com, because these are the only who ship in my country and with less taxes.... So maybe I missed something when reinstalling everything.... but I dont think... only when I install the injector lines to the connector tubes.... it was difficult to reposition them.... so thank you very much for your help.....

Mopar1973Man - You'll see the engine stall easily... What is the cause?

Edited by Mopar1973Man

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  • jeremyf9806
    jeremyf9806

    Hi everybody, it s ok. The truck works now..... intéressant is no cut off.... The culprits: rebuilt injectors 75hp more, and tps ( I don t understand why it worked before... electronic 😁😁, like the v

  • Andyba20
    Andyba20

    Looking back on the thread, Mike mentioned this a few days ago “Remember Bosch stock injectors are NOT made as a set. You could have low end of 293 bar you the high end of 327 bar. This can affect i

  • jeremyf9806
    jeremyf9806

    OK. So I think saturday I will put stock program the ecm to check if it works.... I dont want to loose my eyes with a chinese tester....

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  • Owner

it seems like it's mostly fuel related issue. You can't obtain the speed you are requesting of the engine. The idle speed is lower. Be aware idle speed will change with coolant temperature, but typically when it's way high, like above 225℉. I've played with a rheostat and varied the resistance of engine coolant to see what it controls. IAT will change the aspect of the timing of the VP44. The higher IAT is much more stable for efficiency. (80 to 140℉) is optimal.

I'll keep thinking on this why I'm working here on the site. I'll dig for an answer.

  • Author

Hi,

I think i m going to change the MAP sensor to see if there is a change.....

If not, there are two solutions that will cost me a lot of money.... send my old vp44 in for rebuild, or change the ecm, or change the torque converter , but I dont know... because honestly I don't see anything that's causing these problems.... it's driving me crazy..... I'm also wondering if my pump is properly calibrated, if so what the symptoms would be, or if an electronic component of the injection pump is defective or burned out ... I am convinced that I installed my injection pump correctly. Because if that were not the case, it would not even start....

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