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Go Back   Dodge Cummins Diesel Forum > 2nd Gen. Dodge Cummins 98.5-02 24V Forums > 98.5-02 24V P-Pump Conversion
98.5-02 24V P-Pump Conversion Discussion of converting 24V trucks from the VP44 stock pump to a P-Pump powered 24V No Advertising ...NO ADVERTISING

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Old 12-10-2010, 01:34 PM   #1 (permalink)
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How much wiring harness?

So supposing I wanna swap in a P7100 into my 2001 model year truck.

At minimum, I know I'd need the gear case, some fuel injector lines, and the proper throttle linkage and cable... However, I'd probably be throwing all sorts of codes.

Could I easily connect the wiring harness and ECM from a 1998 model year 12 Valve to my 2001's PCM? Or could I swap out my 2001 PCM with a 1998 PCM?

Do the PCMs in these trucks have anything to do with the ABS, Airbags, or other functions?

Basically, I'm trying to make a seamless swap... Almost emissions passing if the inspector isn't paying attention.
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Old 12-10-2010, 02:17 PM   #2 (permalink)
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The only difference electrical on my truck is the check engine light is on. I just unpluged all the wiring related to the vp. If you live somewhere that has emissions I'm sure somebody else on here has tried it and can give advice.
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Old 12-10-2010, 05:58 PM   #3 (permalink)
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Almost emissions passing if the inspector isn't paying attention.
Not worth the effort... you'd be better off just swapping a complete 12valve with it's full wiring harness and a 12valve dash into your truck...
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Old 12-10-2010, 10:45 PM   #4 (permalink)
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Not worth the effort... you'd be better off just swapping a complete 12valve with it's full wiring harness and a 12valve dash into your truck...
Why would I put the entire 12 valve engine in?

Just the P-Pump and 12 valve wiring harness and ECM on the 24 Valve engine.

It'd be just like putting a 24 valve head on a 1998 truck.
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Old 12-10-2010, 11:28 PM   #5 (permalink)
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Why would I put the entire 12 valve engine in?

Just the P-Pump and 12 valve wiring harness and ECM on the 24 Valve engine.
Frankly, I don't understand all of the logistics of swapping over a 12valve wiring harness and ECM and what 24valve sensors you can retain, which ones have to be pitched in the garbage, which sensors from a 24valve can even be used with a 12valve ECM/PCM.... i have no doubt it can be done but then you're just adding more complexity to the Ppump swap.

that's why I say it would just be easier to swap a complete donor 12valve engine, harness and dash into a truck...
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Old 12-13-2010, 06:52 PM   #6 (permalink)
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p pumping your truck will make your check egine light be on for vp codes and possibly cam sensor depending on the year and map sensor. you can take out the check engine light bulb becuase it wont turn off. i dont see the need in swaping in a harness or 12v
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Old 12-14-2010, 08:25 AM   #7 (permalink)
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Quote:
Originally Posted by kscumminsdriver View Post
Frankly, I don't understand all of the logistics of swapping over a 12valve wiring harness and ECM and what 24valve sensors you can retain, which ones have to be pitched in the garbage, which sensors from a 24valve can even be used with a 12valve ECM/PCM.... i have no doubt it can be done but then you're just adding more complexity to the Ppump swap.

that's why I say it would just be easier to swap a complete donor 12valve engine, harness and dash into a truck...
Don't need the engine, just the harness, PCM, and from what I'm finding out, the gauge cluster.

12 valve PCM controls the automatic transmission using the TPS/APPS. So I use a 12 valve TPS/APPS on the P-Pump swapped engine and hook it to my 47RE... Or not, I can go manual valve body.

On the 24 valve, the gauges are all controlled by the PCM. So I throw in a 12 valve gauge cluster and all appropriate sensors, wiring harness, etc.

Quote:
Originally Posted by Crammins View Post
p pumping your truck will make your check egine light be on for vp codes and possibly cam sensor depending on the year and map sensor. you can take out the check engine light bulb becuase it wont turn off. i dont see the need in swaping in a harness or 12v
I can't take the Check Engine bulb out, because there is no bulb. It's an LED soldered into the gauge cluster. Plus that doesn't make it stop throwing codes out the OBD2 port. I don't want to throw any codes. Hence why I want to swap in everything properly including 12valve PCM.

I want the PCM to say that everything's working good. I want the OBD2 readings to look legitimately like they would on a properly running 12 valve truck.

You can't pass emissions while throwing codes.
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Old 11-27-2011, 11:55 PM   #8 (permalink)
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How goes it

How did u make out with this swap. Mostly the emmisions test
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