I took my truck too a local diesel shop and they gave me the grave news that my injection pump needed to be replaced....i wasnt surprised by the news its just not really what i wanted to hear. They told me i can keep driving it for now but it will eventually die....they also gave me some advice that if it was their truck they would convert it from electronic to mechanical pump. They didnt go into to much depth on prices and how much it would be to convert they just said it would be a near permanent fix to an agonizing and repetitive issue. I noticed online that the mechanical pumps were cheaper but i didnt know what else was needed to convert it. I was wondering besides the pump and lines what else was needed and if it was a cost effective fix? also from the people who have done it what kinda results after the conversion?

Have you read up on the pmd. That's the little black box on the injection pump. Usually what's wrong with it. Read up on it and would look into that first... Just my 2 cents...

I thought that might have beed the problem but the codes that i posted on an earlier thread when the problem first started show favor toward the ip. Then when i had the shop look at it they said they were going to replace the entire system including the pmd but they were almost for sure the ip was failing

That can be done, EK, but you need to check into your state's federal emissions inspection policies - most states don't allow the conversion - check ebay for bobbiemartin's conversion booklet - has all the details

Do you guys know of anyone that has already done the conversion with no problems and is it just as pricey as exchanging the old one out for the same electric pump

Likely just about the same amount of $. There is alot more work involved, though.

The conversion can be done.It's not hard to do at all.Like you said you'll need the 4911 mechanical injection pump,injector lines along with the throttle cable and accelerator pedal.The DB4 4911 will take the place of the electronic DS4 perfectly.If you've got a manual tranny,the swap is a breeze.With a automatic,you'll need some sort of stand alone computer to work the shift points.

Many chevy/GMC cube vans from the early to mid 90's had these stand alone ECM's with the mechanical injection pump.(DB2 5088 was used with the 6.5 N/A and the DB4 4911 with the 6.5 TD)

I'd love to do this conversion - just no time and not financially feasible right now (my '94 is my daily driver) :(

I would definately do a remote (Heath Diesel) PMD before even thinking about doing a Injection Pump change. The pump itself - if well maintained - should last a long time.

I hope Diesel Pro will chime in on this as to the technical spec of a IP lifespan.

Most shops seem all to eager to change out the entire IP instead of troubleshooting it to a possible PMD.

In the end, it is your dollar and your truck... but I would take the advice of others here and check to make sure it is not a PMD. If it is, I would relocate it.

Going from electric to a mechanical IP is alot of hassle. When/if my PMD fails, I'm remote mounting it. The elecric IP isn't a bad pump at all.

I have heard from many people that the electronic ip is junk and that if i was to replace it that it could fail again in 15,000 miles.. Thats why i was questioning the mechanical conversion.. But now from talking to you guys im more intersted in the pmd being the problem and not too worried about the conversion.... Any steps on diesel place on checking the pmd and is the pmd going to be any cheaper of a fix???

The PMD will be cheaper to fix! It's a $300 part. We need to replace ours now too, and bought the $550 Heath remote mount kit. SSD also makes a $400 kit that is supposed to be worse than the stock location. We aren't even going to remove the one on it, too much of a pain. I agree though, the mounting location of the PMD is the problem with the EFI, not the pump. The pump itself should be no different than a mechanical one, as far as durability goes.

You might also find where the mechanical pumps fail quickly if not rebuilt correctly and completely, and most are not completely rebuilt every time.

Thats good news! but is there still a way to diagnose that the pmd is the problem for sure???? i just dont want to be stuck with a new pmd if thats not the isssue....and if i do just replace the pmd is there any recalibration that needs to take place with the ip???

I have heard from many people that the electronic ip is junk and that if i was to replace it that it could fail again in 15,000 miles.. ?

Not junk, has issues, no test for PMD other than to try it, maybe you have somebody nearby you, you can try yours in. Actually electronic IP has more delivery than a mechanical if you have a program that requests the extra fuel.

if you remote mount a driver it all likelyhood it won't fail again, buy a Heath remote kit, if it does fail again you will be covered for 7 years from subsequent failure.

1st have you done all the inexpensive stuff before saying the driver is the issue

No recalibration is required, mount the kit, plug in the extension harness & drive without worry next 7 years