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Engine/Transmission (1998.5 - 2002) VP44's woes and Marvel Mystery Oil

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OK here it goes.



Just ordered my 3rd VP44 in less than 2 years. The original VP44 finally went out at about 200,000. I ordered a new pump from Blue Chip and installed it with a new FASS pump as well as upgrading the fuel lines to the big hose kit. Things were going well, but I started using Marvel Mystery Oil as the additive to help lubricate the pump. Within a couple of months after switching over and 18 months after installing, the VP44 went out. It was throwing the 0216 codes and was causing the dreaded "no power" while pulling minor grades.



Talked with Chip at Blue Chip and he was willing to do something to help me out even though it was out of warranty. When I pulled it off, there was some visible corrosion inside the port of the VP44. I sent it back to Chip and he told me that it was Fuel Contamination. He did cut me a break on a new one, and I installed it.



Well, it is 4 months since I put the new one in. I was still using MMO as a lubricant but now I am getting the 0216 codes as well as the "no power" thing as well. I called quite a few Injector shops and they all seem to think that the pump is on its way out again. The three things that are in common are that it is a Blue Chip pump, Shell Gas and the MMO. I have been getting fuel from the local shell station and there are a number of us in my home town that have diesels. No one can recall ever getting bad fuel from Shell. If they had, it would have gotten around. Chip at Bluechip has a very good reputation here on the site and has been helpful (but doesn't return calls very well :rolleyes:) and supportive, it may be a bad pump, but I doubt it, things just don't go well and then down like that unless it is electronic, which leads me to the same conclusion, that it has something to do with the fuel or MMO.



That leaves me thinking that MMO may be the culprit. I discussed this with Chip, but he didn't seem too concerned about MMO. I did get a "no one deserves fuel contamination twice" as that is the suspect. I discussed it with the guys at Industrial Injection and they didn't seem to have any take on MMO but said they only recommend Stanadyne.



Now I have to change it out again. Unfortunately, even though Chip has been helpful, and the pump is under warranty, I am going with a different vendor. I just ordered one from Industrial Injectors and will not be using MMO anymore. I figured that if I change both, maybe this issue might just go away. I hope so anyway.



So, does anyone else out there have a different take.
 
I have been using mmo since new now have 475000kms or 295000k on original vp-44. we also use mmo in radial engines in the oil and fuel ,no problems. I dont think your problems are related to mmo. ame/a&p
 
The MMO is not a good lube for the injection pump. Do a search in this forum for fuel addatives, Power Service is a better choice. Ron
 
The MMO is not a good lube for the injection pump. Do a search in this forum for fuel addatives, Power Service is a better choice. Ron
If its not a good lube for injection pumps explain how my early version with the brass rotor is still running at 295000k, doesnt make sense to me. How many other vp-44s have reached this kind of mileage.
 
So, does anyone else out there have a different take.
I have to wonder what's the probability of 2 VP44's from a respected rebuilder failing so quickly on their own? Not impossible of course, but it seems unlikely.



Some questions:



You said you have a FASS, so we can assume you have good fuel pressure at the VP44 under all throttle / load conditions... or can we? What are the fuel pressures at idle and WOT?



I ask because the P0216 code can be caused by several things besides internal problems in the VP44. Some are the fuel injection pump gear not aligned, a clogged fuel filter, or fuel inlet and/or line restrictions. Good fuel pressure at the VP44 under all operating conditions would tend to eliminate the last two items.



Good luck,



John L.
 
The FASS is working properly. I have about 14 to 16 psi at Idle and greater than 10 at WOT. I have the pressure transducer downstream of the filter so I am monitoring the pressure going directly to the VP44. The gear pump not being aligned isn't it either. If it was, I would have been having issues earlier. The first pump was fuel contamination, and based upon what I saw in the inlet port of the pump I believe it. This second one is doing the same thing. The pump is running fine then looses power, especially when pulling extended minor grades. That is when it throws the code. I have a code reader and have erased the code to see if I could identify when it happens. I only happens when there is a "reduced power" condition. It has something to do with the timing advance of the pump according to Chip and the guys at II. Different builders use different materials in their pumps. I am just wondering if MMO attacks this particular combination.



To FourBarR's point, brass may be fine with MMO. Brass should make a good rotor as it tends to have self lubricating qualities and is corrosion resistant(no flames, just an observation).



Thanks for the advice.



Gary
 
I had a bad load of fuel from a Shell station 5 years ago ( https://www.turbodieselregister.com/forums/general-diesel-topics/12655-grrrrr-bad-load-fuel.html ) and they wouldn't do squat about it. I heard from MANY people that had bought bad fuel from Shell. I personally won't buy any Shell fuel now. If you got 200,000 out of the first pump without running an additive why did you decide to start running some? 200k isn't bad out of a VP44. I've had Stanadyne recommended by many injection pump shops and when I run an additive that's the one I run.
 
I started running additive in becasue of the ultra low sulfur diesel now avaliable.



I stopped getting fuel on base. They are 50 cents cheaper than shell, but I suspected that they may have been the cause of the original going out. Now I am not so sure. :eek:



Where I live there are only a few shops that carry diesel locally, Shell is considered to be on of the better ones. I heard that from a couple of Mechanics. On my street alone we have 8 diesels and we talk a bit.



Maybe I should start getting fuel on base. :) But I will stick with the Stanadyne now.
 
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