Ds4 to Ds2 convertion...

BoostedWorkVan said:

So I am having some power loss issues, pretty close to certain that FSD is failing or IP is failing. My question is how do able is the converstion and what would be the cost? With the 4L80 wouldnt I need a stand alone computer?

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BoostedWorkVan said:

I have a 99' 6.5 td in a express van cutaway 1 ton. The engine has just over 100k, oem turbo reman less than 20k, brand new stanadyne pump 20k, fsd relocated to radiator support.
The issue is when engine reaches certain rpm i can hear the engine almost sputtering. When you let off the throttle it kind of bucks and sometime the ecm will put it in limp mode with out even throwing cel. But as of now the cel is on, last time i checked it was for boost sensor and fuel control solenoid. I want to fix the fueling issue first then see if the boost sensor code returns.

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BoostedWorkVan said:

The issue is getting worse before it was just back firing or the fuel was surging upon letting off the throttle. Now i will ease into the throttle and find the right spot for the failure and under load it seems as though it is half way through the desired rpms for gear shift. I am going to service the engine soon probably this weekend. The issue is so bad that i am only getting 9mpg loaded or unloaded doesnt seem to make a difference. When the truck goes into limp mode i can only use .25 of the throttle. This weekend i will also remove the doghouse and passenger seat and switch back to the pmd to see if that makes any difference. If it does then i will order a new FSD. It would make sense if the fsd were at fault because i was in an accident a few years back and just got the truck on the road this year. With the relocation kit putting that thing right at the radiator support i am wondering if the shock from the accident damaged it? FFM? Fuel filter module? Just curious if your talking about the little lift pump or the filter water separator?

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BoostedWorkVan said:

Yes i know where the lift pump is just was curious as to what ffm was. I work on diesel trucks and know a bit about them just trying to see if anyone is having same issues. If my fuel filter was deteriorated i would have shitty power all the time due low Pressure at IP and would eventually take my pump out. But as i said i will be servicing the engine and trans this weekend, so hopefully changing the fuel filter will help.

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BoostedWorkVan said:

I know enough about any diesel to keep it running, i have had the truck for 4 years and have had issues with the FSD in the past, similar to what i have now. i am servicing the truck tomorrow and i know it will help with some of my issues but i am confident that my FSD is breaking down at certain rpm or tps. Seems like signal interferance.

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BoostedWorkVan said:

Lol well Mr Cowboy the pump was replaced less than 20k mi ago and it is not a reman, engine was replaced just over 100k so tbh nothing is really has that many mi on it. Like i said i had an accident in the truck a few years back and with the FSD being located on the radiator support it was right there where the impact was. But you have fun with your catheters and i will have fun with my diesels. Just thought id hop on here and see what insight i could find some were helpful others just arrogant. I will plug up my old pmd and see if it makes a difference but i will do that after i run it with the new fuel filter, so that i can determine what is at fault. The pmd on the pump starts to act up when engine has warmed up so i will be able to quickly determine what is at fault. If niether works then i will plug my scanner to it and monitor it as i drive.

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BoostedWorkVan said:

The funny thing is that you think it is efi when all it is is an electronically controlled pump, the injectors are mechanical. I am a trained diesel technician and worked on EGR systems much more complex than detroit and gms stab at the 6.5. Had detroit built this engine more like an 8v it would be much more effiecient and have alot more power. Instead gm wanted to cut corners to save money so that made for a weak engine giving detroit a bad name, which is why they went to a japanese diesel because they could get a pretty good engine very cheap.

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BoostedWorkVan said:

Agreed, but no diesel likes air in the fuel system nor does gasoline engines, the other guy responded saying i should not even be changing oil in an efi 6.5 td, which is why i stated that it is an electronically controlled mechanical pump very similar to a pressure timing pump on a 6bt cummins....
At any rate i serviced the engine ran the piss out if it and it def helped the situation but did not fix it. I am getting a boost sensor code so i will trace that down, could be exhaust leak or may need to replace the gromets on the turbo inlet. Now here is a question for anyone who owns a van with a TD are there any CAC upgrades available or do i need to fabricate one for better induction?

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BoostedWorkVan said:

Besides in my original statement on what is wrong with the truck i have never stated that it is acting like it is starving for fuel, it is really acting like it wants to keep fueling as i let off the throttle which is what makes me believe that the driver itself is at fault and if i need a new pump i would much rather go back to the dinasaur age with a DS2 pump seeing how the DS4 is relatively new and at 1100 doll hairs i dont want to have to keep replacing this pump.

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BoostedWorkVan said:

You must bot be able to read very well, problems started occurring after i put the truck back on the road. Maybe you fell in cow **** and cant see but the pump was installed due to an optical lense code, the FSD as stanadyne calls it was relocated to the front bumper because the pmd overheated and screwed up the driver. When you are done being a jack ass know it all i would much rather talk to people with common sense. I am willing to put money on the fact the fsd is bad because they are sensitive to heat and when you put them in the grill the have a front end collision and yoi begin having fuel control issues, kind of like a domino effect here. Even someone who doesnt know **** about any diesel engine could relate. Hey guess what fuel pump aint starving yet it is still doing the same thing. You are about the equivilant of a babbling idiot that thinks he can fix anything because he has google. Dumb ass...

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BoostedWorkVan said:

Fyi electronic fuel injection pump is still much different than electronic fuel injection, efi is electronic fuel injection not pump electronic fuel injection is when you have electronic fuel injectors on a common rail set up, there have been many form of electronic pumps but are still mechanically injected because they are timed mechanically. Learn the difference before running your cock suckers.

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