6v92t larger injectors

Scott & Heather · October 10, 2014, 04:53:23 AM

Yes gents, the loss of power issue has been a long running problem for us since we ran a partial tank of we'll filtered (extremely clean using a professional grade centrifuge) motor oil diesel mix. Cliff told me way back then I probably toasted my injectors. Coach runs like a champ in all other ways, just lost some of its top end power. Everything else has been checked. Everything. Tank was polished, fuel lines blown clear, fuel hoses replaced, fuel filters changed three times. New air filter, turbo checked and was fine. Throttle cable adjustments made, fuel lever checked. No smoke at all. Like zero smoke even under full throttle. Used to have a little tiny bit of black smoke under full throttle but not anymore. Been averaging 7mpg which is more than usual. Coach definitely starving for fuel. Injectors and rack run should solve issue. It's reaching 2250 no load rpm and fuel pressure has been checked and is fine. Anyway, wwwilliams should know today what my issues are. Again, coach starts and runs perfect, just a little low on power.

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TomC · October 10, 2014, 05:03:13 AM

The difference between driving the 8V-71 with no turbo and N65's compared to driving with 7G75's and turbo is drastic. Without the turbo, pretty much drive with the foot on the floor. With the turbo, I rarely (even going up hills) have my foot on the floor. Mostly just about 1" of pedal to get going (it shifts around 1700) and a little more to get on the freeway. As said before, it is nice to have more than enough power for passing at times. Good Luck, TomC

luvrbus · October 10, 2014, 05:08:33 AM

I hope you get lucky and it is only the air gap on the governor ? I thought the other Scott was going to check it for you and now I see you are at the Golden Palace

I like WW Williams they give the young x Arm Forces people at shot at showing their skills on a 2 stroke

eagle19952 · October 10, 2014, 06:54:41 AM

Joe might have it there, leaking air feeds on the output side of the turbo can be as bad as a stuffed up fuel filter, start checking the little things they add up fast.

luvrbus · October 10, 2014, 07:57:59 AM

turbo piping leaks leads to lots of black smoke most of the time

akroyaleagle · October 10, 2014, 03:50:24 PM

Turbo leaks may not lead to lots of black smoke Clifford if not enough fuel is getting there to make smoke. Would it?

With the additional info, I now think plugged injectors.

I have dealt with collapsed fuel filters before that gave the same indications.

I would never put motor oil, ATF or anything else in my fuel except heat if I could only get #2.

Watch me stir the pot. I love Willie, but I thinki Bio Diesel is kumbaya. YOMD

It is very easy to go down the wrong path if enough information isn't given in the original post.

eagle19952 · October 10, 2014, 04:42:14 PM

Joe, when I worked in exploration out on Pet 4, we stockpiled fuel in Peard Bay, we transported it in 2-3000 gallon lots around the fields to drill sites, we had lotsa Detroits. Story short we added 55 gallons of ATF or Hyd Fluid to each 2000 gallons, the DD injectors thanked us. hauling it cross country mixed it well.
the right stuff doesn't hurt.

akroyaleagle · October 10, 2014, 10:18:32 PM

Don,

I've seen a lot of that. And more.

Those guys didn't have to pay for repairs, I do.

We had an Eagle at Ft Richardson with a natural 8V71. I asked the depot guys to adjust the ride and fix some leaks. They installed a complete new gasket set and 15/40 oil. I told them we shouldn't do that. They showed me all the 2 stroke Detroits, (mostly 8V92TT), they had on the floor and said That's all we ever use. The Army no longer has 40Wt. We never had any problems but I use 40Wt in my 8V92TA.

I would have liked one of the 1200hp 92's they showed me but it wouldn't fit in my Eagle.

HEMMTs are 8V92s!

oldmansax · October 11, 2014, 03:54:49 AM

The PO hot-roded the 6V92 in my Bluebird. It smokes like a freight train on startup. So bad you can't see the back of the bus. I would try to stick to something close to stock.

TOM

luvrbus · October 11, 2014, 07:04:59 AM

You install 9G90 injectors in a pre 1985 6v92 because of the cams those puppies will smoke lol you want see smoke install a set of 9G90 in a 92 series with the CA cams set at 1.460

eagle19952 · October 11, 2014, 09:50:21 AM

Joe, do I know you...

I worked in the depot maintenance shop on Ft Rich in the early 70's were you there then, what outfit were you with ? heck i can't even remember mine today... I ets'd out to Evans engine in anchorage.

Quote from: akroyaleagle on October 10, 2014, 10:18:32 PM
Don,

I've seen a lot of that. And more.

Those guys didn't have to pay for repairs, I do.

We had an Eagle at Ft Richardson with a natural 8V71. I asked the depot guys to adjust the ride and fix some leaks. They installed a complete new gasket set and 15/40 oil. I told them we shouldn't do that. They showed me all the 2 stroke Detroits, (mostly 8V92TT), they had on the floor and said That's all we ever use. The Army no longer has 40Wt. We never had any problems but I use 40Wt in my 8V92TA.

I would have liked one of the 1200hp 92's they showed me but it wouldn't fit in my Eagle.

HEMMTs are 8V92s!

akroyaleagle · October 12, 2014, 12:31:25 AM

Joe, do I know you... I worked in the depot maintenance shop on Ft Rich in the early 70's were you there then, what outfit were you with ? heck i can't even remember mine today... I ets'd out to Evans engine in anchorage.

I was not at Ft Rich then, I was still protecting us from I don't know what in SEA.

When I lived in Alaska from '89, I flew commercially.

I got bored in 2004 and took a job managing the Army Commercial motor pool. All my trucks, buses, and cars were ordered off the shelf through GSA. All maintenance was contracted off base. I drew the Eagle from property disposal when it was turned in by Elmendorf AFB band. It was considered a military vehicle, GSA had nothing to do with it. That's why I had to get the Depot guys to perform the maintenance. I had no mechanics, only drivers.

eagle19952 · October 12, 2014, 08:56:42 AM

is that the Eagle you have now ?

In 1984 I went to Shemya and worked as WL-10, running the Airport Vehicle Maintenance Snow Removal Support Operations until 1989.

Prior to that I worked for RCA/OMS as Lead transportation At Tin City for too long...

akroyaleagle · October 12, 2014, 03:21:24 PM

No, that Eagle was ex Air Force. I got it for the motor pool in '05.

Mine was a Hanford bus. I got it in '96.

Scott & Heather · October 12, 2014, 04:37:02 PM

Well, yeah, the bus will run good on black diesel...but there is so much suspended carbon in the motor oil that I think it dirties the injectors. Hopefully they will tell me monday. Scott Crosby has been very helpful but I waited too long to get him on board and he's swamped right now. I leave for a 3000 mile trip over the course of a month so I need to get this beast running good again. We have an intense schedule coming up. Since we are full timers we are staying with friends at the moment and I hate living out of a suitcase

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