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Upgraded injection pump 6.2

brt666

brt666

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I have a 6.2 J code engine from 1991 connected to a 4L80E in my suburban.
The injection pump is toast and i'm looking at buying a new/refurbuished unit.

I have heard that the injection pumps goes bad because the diesel is too dry. I love this truck and plan to keep it the rest of my life. It has about 360.000 km on the meter now and i want to buy a pump that will last as long as possible, that is prio 1, i Can accept a price up to $ 1.000, are there any pumps that are considered better than the original one? Are there any "upgraded" pumps that can handle the modern diesel fuel without additives? I have already changed the fuel filter to a standard commercial truck one.
 
Rene can point you to a place in Texas that does quality work at a reasonable price. I have not heard of any upgrades available for modern fuels though. In the USA, most ULSD is now mixed with a small amount of bio diesel to bring back the lubricity. Not sure what you have out there.
 
I used accuratedeisel.com and had mine rebuilt, pretty sure it was Tim I dealt with there. That was 10 years ago now :doah:

Regardless where you go you will need to send a regular diet of additives through it, or you'll be having it rebuilt fairly often. All we have up here is ULSD, and it does play hell with the old IP's like ours.

Accurate doesn't show 6.2 stuff on it's product page, but I'm certain they still can rebuild them. Here is the contact page, the phone will probably be the best. I'd ask for Tim, he may still work there.

http://www.accuratediesel.com/contact_information.html
 
Have you considered using a fuel additive? I know there are several designed for use of new fuel in older diesels, they claim to boost cetane and lubricity, but I don't know how well they work.

This reminds me of my time in the military. The IPs on Humvees generally had a short life due to the high temperatures and use of JP8 fuel.
 
Marvel Mystery Oil is supposed to work well to keep the pump lubed ,and it dont take much per tankfull to do it..some guys like using 2 stroke oil or some straight weight engine oil in their diesels..
 
I've known guys to use Dextron also. You didn't hear this from me but add about 5 gallons of HHO once and a while. Your truck is older and emissions are not checked. 6.2's love the stuff. Sulfur adds lubricity and heat. More heat or BTU's means more power and better mileage.
 
I'm leery of ATF because it could contain friction modifiers that would be abrasive perhaps and if that gets to the pump, its not going to do it any justice..I'd stick with motor oil,2 cycle or Marvel,or an additive like Howes Lubricator or Power Kleen..

I used almost a tank full of old home heating oil in my truck that a friend had in an oil tank he removed from a mobile home that was converted to natural gas--it had sat beside his shop almost a year--I was plowing his lot out and was very low on fuel,and the nearest station that sold diesel was a 5 mile ride,so he asked me if I wanted to use the fuel oil,I could take it all if I wanted,so he could scrap the tank before it started leaking and caused a headache with the landlord and other officials..

..I got almost 40 gallons out of it,but used most of it in my own home furnace,and dumped the rest in my truck ,that had maybe 1/4 tank of diesel in it still...only took maybe 10 gallons to fill it..

I did not notice any real difference other than that tank full seemed to get used up a lot faster than diesel,it may have been kerosene ,not home heating oil..it seemed to have less viscosity..it was a light purple color,not the usual greenish color diesel and HHO is...it seemed to me I should have gone twice as far on the amount of fuel than I did with the truck compared to diesel fuel...
It did seem to idle a bit smoother and start a bit faster for awhile,but after I filled it with diesel again its back to having an ocaisional misfire at idle again..and takes more cranking to get it to fire--but it might have a few dead glow plugs by now,and its been pretty darn frigid here lately--surprised it started at all without the block heater being plugged in,to tell the truth..

I was afraid I had got some water in my fuel when I used that old oil--shortly after that I had my "water in fuel" lamp come on,so I drained the tank using the factory siphon setup,and no water was evident in the stuff I drained--nor was any in the fuel filter that I could see...So,I figured the thing was lying to me...sure enough,by wiggling the connector where it plugged onto the sending unit,the lamp went off!..its come on a few times again and every time I move the connector it goes out again..so I'm basically going to ignore it--weird thing is the gas gauge works fine regardless.which I'm thankful for..
Eventually I'm going to swap the fuel tank lines and wiring to the "good used" tank I put on the drivers side anyway...the right side tank I'm running it on now has a weepy corner thats likely to get worse after the salt eats it more this winter..
 
paratrooper307 said:
Have you considered using a fuel additive? I know there are several designed for use of new fuel in older diesels, they claim to boost cetane and lubricity, but I don't know how well they work.

This reminds me of my time in the military. The IPs on Humvees generally had a short life due to the high temperatures and use of JP8 fuel.
Click to expand...

we would put a quart of 15w40 in the fuel tank every couple tanks and this seemed to fix our issues, but that was 10 years ago and a lot has changed.
 
I got my pump from Kennedy Diesel - I'm very, very happy with both their service and their products. I told them my setup and they built the pump for use with my aftermarket turbo on my 6.2L. It arrived and needed no fuel adjustment after install. These guys know the 6.2/6.5L inside out and have a stellar reputation. They also do not charge a core unless you don't get the core back to them within 30 days of receiving the new pump (all others I looked at charged for a core up front and then refunded later).

As far as a lubricant, I run the Walmart ashless 2-stroke oil (TCW-3) at 200:1 mix ratio. I based usage of that additive on this study (as well as wide positive usage in the diesel community): http://www.dieselplace.com/forum/76.../177728-lubricity-additive-study-results.html
 
loss of fuel

When my 6.2 sits for over a day it seems to run out of fuel in about 30 seconds. I added an electric fuel pump at the tank, changed the fuel filter, by passed the manual pump on the block use fuel additive at every fill up. I pulled the intake and tightened all the connections on the fuel lines, no leaks on any line:confused:. Nothing has helped any one have any ideas.:dunno:?
 
harry 387 said:
When my 6.2 sits for over a day it seems to run out of fuel in about 30 seconds. I added an electric fuel pump at the tank, changed the fuel filter, by passed the manual pump on the block use fuel additive at every fill up. I pulled the intake and tightened all the connections on the fuel lines, no leaks on any line:confused:. Nothing has helped any one have any ideas.:dunno:?
Click to expand...

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