HELP - 8V92 will not start

[ronmarabito2002]

Sure hope you find the problem and get underway.

R.E. (Ron) Marabito, Dallas, TX 92WB40

--- In WanderlodgeForum@yahoogroups.com, "Larry Kehler"
wrote:
>
> I am making some progress but I thought I would update everyone on
> what is happening.
> Using Curt's article on replacing his fuel hoses, I built a electric
> prime pump and put a ball valve to open and shut the feed line.
> I ran about a gallon of fuel through the system and then tried to
> start the engine with the electric pump still running. It cranked and
> pumped out white smoke. After several more pump tries and more white
> smoke. I determined that lost prime was not the problem. It was
> clear that the injectors were not firing. I started worrying that I
> had toasted the ECM. I decided that I had to find a 92 series
> mechanic with some diagnostics tools. I drove to several truck repair
> garages and got the same response-
> "yea we work on Detroits" - "What do you mean 2 stroke, I never seen
> no 2 stroke diesel".
> Then I found on the way home, the Detroit Diesel Dealer has moved to
> within 10 miles of my house.
> I found a old 92 series mechanic who was at the new facility teaching
> young mechanics. He took me to a 89 Newell coach and told me that if
> my stop engine and check engine light come with the ignition switch
> and then both go off after 10 seconds, my DEC ECM is OK.
>
> I showed him what I had done with my prime pump. His response was
> that the injectors were not firing because I need 80 Pounds of fuel
> pressure to fire. He said it could be leaking hoses or fuel pump.
> He suggested a pressure gage to check the fuel pressure. He also
> showed me to which outlet hose to pull off and put in a bucket of
> clean fuel and crank the engine If I get bubbles in the fuel, then I
> likely have a bad hose. If the flow is clean and clear, then I might
> have a bad pump. The pressure gage will tell the story on the pump.
>
> Two bad possible causes is a broken drive shaft for the pump. The
> other is the sensors that time the ECM. The last two options would
> require towing the coach to their facility.
> If it is a new pump, he said I should be able to replace the pump and
> told me the steps to pull the Coldplate/DECC.
>
> So I am encouraged that I will be able to get going in the next two or
> three days. I will keep you posted.
>
> Larry Kehler
> 1994 PT-40 WBDA
> St Louis
>
>
> --- In WanderlodgeForum@yahoogroups.com, "ronmarabito2002"
> wrote:
> >
> > If you got those injectors dry, it might take a while to get fuel
> > through and the engine fire. Also, I assume the engine is cranking at
> > a pretty good speed. Weak batteries won't spin the engine fast enough
> > to get a compression ignition.
> >
> > I spent 35 minutes once repeatedly cranking before I got it to run.
> >
> > R.E. (Ron) Marabito, Dallas, TX 92WB40
> >
>