1992 6BT info needed
 

Looking for info on some slight power upgrades for a 92 cummins 6BT 230 hp with a allison 6 speed its in a 33 ft winnabago that i have recently purchased the engine only has 38000 miles on it and seems to be lacking a lot in power thinking the pump and injectors are either weak or really dirty any suggestions would be appreciated ...Barry

We can do what you need. It will be helpful to know the replacement part # so I can see if the extra rated hp of 230HP is in the injectors or the pump. Call cummins and give them your engine serial number and get price and part # for replacement injectors then give us a call. You will be happy.

Also know the HP/torque rating of your transmission. We do not want to create any problems with too much power.

Check simple things like fuel filter/LP, timing, throttle travel and possible trans issues before assuming the pump or injectors might be bad/dirty. Very unlikely in a 38k engine.

That thing is barely broken in.

progress
 

:dang:Well installed a new lift pump (the old one was siezed)..it ran great for 2 days and started loseing power and stalling the stalling is a new thing..Replaced large water seperator still acts like it runs low on fuel and then runs OK for a bit then the loss of power again up and down.Could the new lift pump from cummins be gone or is this a plugged filter ...A question could I run a in line fuel pump for a lift pump and what would the maximum pressure for the fuel lift pump be.. :argh:

What is the condition of the fuel tank?

Sounds like it is clogging the filter.

You might want to check the fuel pump pressure. New parts can malfunction

Dirt
 

Pulled the filter closest to the tank and opened it had a good quantity of rust and rust colored sluge seems I have a rusty tank and just after a fill..Do diesel tanks have any screen in the tank sump or are they just a open line.Is it worth the time to try flushing or just look for a clean one or are there any types of liners...thanks for your time guys..

My experience is that Diesel does not cause rust. It's water in the tank that causes rust. On my farm tanks I put on good filters with water traps and got along fine. the filter was at the lowest place on the tank so the water would drain to that point.

Yes all my filters are above the tank and there is no way to put them below tank is not 12 in. above the road looks like the screen in the tank is plugging ...Looks like a messy job needs to be done ...hi ho hi ho and its off to work we go...

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My computer keys stick..it has 138000 km on it ...

I would replace the tank. Cleaning/lining bad fuel tanks is not always a successful solution. Often that approach just takes more time and money and you end up no better off than when you started.

your filter doesn't have to be below the tank. The outlet needs to be coming out the low place since water settles to the bottom. You just don't want to give the water a chance to settle to the bottom and create rust. Even if you put in a new steel tank unless it is coated you may not fix the problem unless you get the water out.

NOW..Allison problem....
 

Fuel problem fixed ...My allison 6 speed is now locking in gear 4th 3rd and giving a do not shift light....what are the reasons for this an some checks that can be done to find out what the problem may be ..reset it and it throws the light in nuteral ...

Can't really say anything about the Allison specifically, but whenever something like that happens to me the first thing I do is clean and re-seat all the electrical connections.

I had the tank removed and inspected 33ft. pusher winnabago could this have pinched a wire when reinstalled ...and be causeing this ..

If the fuel tank is near the trans harness that could be a possibility or just a connection that has been loosened, go with Nadir's suggestion and check all connectiopns.
What was the final cause of your fuel problem?

My fuel problem was rusty lines to the tank .tank was in good shape just had it cleaned and replaced the pickup and filter .Trans had a lot of debree but i am still thinking wire somewhere..

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Would anyone have the wireing diagram for a allison 6 speed push button auto and if it is possible to bypass the faulty wire from the button to the trans .as a test before tearing apart the wireing harness tank etc..thanks in advance..