2003 Super Duty with 24valve cummins - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 19 (permalink) Old 02-01-2011, 02:39 AM Thread Starter
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2003 Super Duty with 24valve cummins

Specs:

TRUCK:
2003 Ford F-250 Super Duty Crew cab short bed 4x4. Was a 7.3 truck from the factory.

2001 5.9 24 valve cummins engine

4r100 transmission with electronic t-case

Destroked Billet Flex plate
Destroked 5.9 to 4r100 adapter
PCS trans controller

Its more or less a project not complete.

-It runs and drives but trans does not shift correctly. feels as if motor is hitting a rev limiter when tryin to shift gears.

-the wiring is ummmm wow (see pics). cant believe it runs.

-when in park runs fine at idle and when you rev it up to higher rpm's

However the engine came from auto truck. I've been told to swap to manual ecm or get it flashed at local dodge dealer......well i called dodge today and they said the can only update it to software of auto status.

Although i have located a ecm at a local wrecking yard but seems a bit pricey.

I have a ford FSM for 2003 Ford and working on getting wiring diagrams for 2001 dodge cummins truck.

YIKES! 7.3 harness


Plugs from 5.9 engine harness next red elbow.


PCS MESS!!!


another shot of 5.9 engine harness plugs



wires to injection pump (ahhh dude used black wires everywhere!!)


A pic of the truck if it all matters




Questions:

Do i swap to manual ecm?
Do i swap to manual engine harness as well?
Or What is wrong aside from the wiring mess?



ALL in ALL Steel @ GOS Performance is great help and has earned my business

Last edited by t3banshee; 02-01-2011 at 02:45 AM.
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post #2 of 19 (permalink) Old 02-01-2011, 05:36 AM
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P pump it

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post #3 of 19 (permalink) Old 02-01-2011, 12:52 PM
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Did you put the Dodge PCM in the truck. The ISB Auto/Manual ECM calibration shouldn't be changing much.

It sounds like the changes need to be made in the PCS 4R100 controller. Does it have definable shift points? What does the PCS controller use for input; TPS? I see the wire ties/splices coming from the TPS.

I have a manual harness but you don't need it. IIRC, the auto ECM/harness just has additional outputs to the PCM.

Pull that factory lift pump and fuel filter housing. Put a good lift pump or system on there like an AirDog. A small block chevy fuel pump cover will bolt-up to cover the hole that lift pump leaves on the side of the block.

Gauges? Do you have a fuel pressure gauge? You need one. If that stock lift pumps goes out and you don't see it you will be shopping for a new VP44 as well.

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post #4 of 19 (permalink) Old 02-01-2011, 03:50 PM Thread Starter
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Quote:
Originally Posted by BombDocDiesel View Post
Did you put the Dodge PCM in the truck. The ISB Auto/Manual ECM calibration shouldn't be changing much.
I only have the ECM thats mounted on the side of the block of the dodge electronics.

It sounds like the changes need to be made in the PCS 4R100 controller. Does it have definable shift points? What does the PCS controller use for input; TPS? I see the wire ties/splices coming from the TPS.
They guy only had 2 wires from the PCS running to the motor. TPS and RPM signal. I'm sure more of those wires need to be hooked up just not sure which ones. As for the shift points kinda whenever it wants to, nothing really definable. I believe you are on the right track it has to do with the pcs business. l will read through the book and intall program on to my computer so i can hook it up to see whats going on.

I have a manual harness but you don't need it. IIRC, the auto ECM/harness just has additional outputs to the PCM.

Pull that factory lift pump and fuel filter housing. Put a good lift pump or system on there like an AirDog. A small block chevy fuel pump cover will bolt-up to cover the hole that lift pump leaves on the side of the block.
It has a Industrial Injection VP44

Gauges? Do you have a fuel pressure gauge? You need one. If that stock lift pumps goes out and you don't see it you will be shopping for a new VP44 as well.
Yeah gauges are top priority. what would you recommend? analog or buy a chip that has digital read out?

Thanks for the help

Last edited by t3banshee; 02-01-2011 at 03:55 PM. Reason: forgot some info
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post #5 of 19 (permalink) Old 02-01-2011, 05:40 PM
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Your ECM has nothing to do with it if the other pieces aren't there to cause this problem.

You need to take a good look at that mess near the VP. Don't use those splices on there. That signal doesn't like any additional resistance as that will change the signal value. Does your PCS just need the actual TPS signal? That's only one wire. The ground and +5V reference shouldn't be needed unless PCS is doing something different in their box. The RPM signal is an odd one. What are you using for that? A Destroked kit? Is it the right tone ring? I'm sure PCS is expecting one like the factory uses, which is a pretty low tooth-count ring. If you are using either the Cam position sensor in front of the VP or the Crank position sensor near the rear of the block it will cause all kinds of odd things since the tone ring is different. You may be able to adjust that with programming, though.

I use an Adrenaline and it can monitor fuel pressure but you have to buy more pieces. I run a cheap Autometer Z fuel pressure gauge on the motor block from my AirDog. I would make getting a pump a priority. You can run a hollow banjo from the test port on the VP. You will need to make sure you get the parts to keep the initial pressure on start-up from destroying your sending unit. If you mount there you should put a turn valve on there so you can disconnect the gauge hardware. Just make sure you get a gauge that uses a sending unit and avoid the ones that want you to run fuel line into the cab.

If you go through my thread when I took my truck apart again you will see which parts of the Cummins harness you need. Mine is a ******* since I still use a few of the GM sensors (except tachometer) so my dash works AND the sensors the Cummins ECM wants to see.

Did you buy it this way or did you build it?

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post #6 of 19 (permalink) Old 02-01-2011, 05:46 PM
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Oh yeah. Look around online for a Cummins ISB valve cover.

It will just say Cummins on it so no need to have the Dodge ground off.

-Josh-
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post #7 of 19 (permalink) Old 02-01-2011, 05:57 PM Thread Starter
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i got it this way. I will decipher what the guy has going on with the wiring. And check your thread for sure. thanks again.
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post #8 of 19 (permalink) Old 02-01-2011, 06:07 PM
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Quote:
Originally Posted by t3banshee View Post
i got it this way. I will decipher what the guy has going on with the wiring. And check your thread for sure. thanks again.
No problem. Keep us posted. If you could also get more pics of the harness as it is. I see what looks like a 6-pin d plug unplugged hanging in there. I also see that 2-pin D from the 7.3 harness. I learned more about how this all works by pulling my harnesses out and going to work.

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post #9 of 19 (permalink) Old 02-02-2011, 05:12 PM
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Dustin,

Tell me I'm not the God of PCS tuning on a 4R100?!?

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post #10 of 19 (permalink) Old 02-02-2011, 05:29 PM Thread Starter
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Quote:
Originally Posted by GOSsteel View Post
Dustin,

Tell me I'm not the God of PCS tuning on a 4R100?!?
There is NO doubt about that. You sir are PCS 4r100 GENIUS! You took a complete disaster of previous owners attempt and made it work.....Great!!!

Thanks.
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