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Was:HELP - 8V92 will not start NOW It runs! - erniecarpet@... - 06-23-2008 11:22



Larry, that is great news. I am thankful that you shared your results with us.
Ernie Ekberg
83PT40
Livingston, Montana
wishing I had a 8v-- or series 60



Gas prices getting you down? Search AOL Autos for fuel-efficient used cars.


Was:HELP - 8V92 will not start NOW It runs! - Larry Kehler - 06-23-2008 13:48

OK Thanks for all the help to everyone that made suggestions.

Today I talked to the old series 92 guru at Detroit Diesel about what
could cause one bank to not fire. He said it could be several things,
a clogged fuel hose, a clogged restricter valve or a blown injector fuse.

I checked the hose for that side by running a long screwdriver though
it. Then found the two inline fuses attached to the center battery.
I followed the wires to the center DEC plug. That plug has two green
wires that go to the battery ground lug. Four orange wires that merge
into two wires that go to the inline fuses. One fuse is the curb side
bank injectors power and the other is the street side bank injectors
power. I wire brushed all the connectors and checked the DEC plug
wires for 12 volts.

I found that someone had cut a wire off the engine that looked like a
ground, so I added a ground wire from the engine to the ground bar
just for good measure.

After purging the air, the old 8V92 fired up and I pushed the high
idle switch for that great purrrrr.

This difficult situation was a real learning experience. I feel so
much more comfortable now with the engine. While I have worked on a
lot of engines in the past, the 92 was a mystery that worried me a
lot. I now know what I would do if the beast quits on the road some
time. I somehow gained a real understanding of the fuel and DEC
system. Just knowing that if the check engine goes out after the 10
second start-up, the DEC is likely OK is a great help. I was so
worried that I had cooked the DEC.

I really appreciate knowing that all you guys are here to make
suggestions and send diagrams when we need them. Thanks again and I
am ready to help with some suggestions now on the fuel and injectors
system.

Larry Kehler
94 PT-40 WBDA "BAM"
St Louis

Was:HELP - 8V92 will not start NOW It runs! - Leroy Eckert - 06-23-2008 14:11

Ok, if I understand it correctly, it was a ground problem; or was it corrosion on the fuse wires? Or both? Glad you got her going.
Leroy Eckert
1990 WB-40 Smoke N Mirrors
Dahlonega, GA
Royale Conversion

--- On Mon, 6/23/08, Larry Kehler wrote:
From: Larry Kehler
Subject: [WanderlodgeForum] Was:HELP - 8V92 will not start NOW It runs!
To: WanderlodgeForum@yahoogroups.com
Date: Monday, June 23, 2008, 9:48 PM



OK Thanks for all the help to everyone that made suggestions.



Today I talked to the old series 92 guru at Detroit Diesel about what

could cause one bank to not fire. He said it could be several things,

a clogged fuel hose, a clogged restricter valve or a blown injector fuse.



I checked the hose for that side by running a long screwdriver though

it. Then found the two inline fuses attached to the center battery.

I followed the wires to the center DEC plug. That plug has two green

wires that go to the battery ground lug. Four orange wires that merge

into two wires that go to the inline fuses. One fuse is the curb side

bank injectors power and the other is the street side bank injectors

power. I wire brushed all the connectors and checked the DEC plug

wires for 12 volts.



I found that someone had cut a wire off the engine that looked like a

ground, so I added a ground wire from the engine to the ground bar

just for good measure.



After purging the air, the old 8V92 fired up and I pushed the high

idle switch for that great purrrrr.



This difficult situation was a real learning experience. I feel so

much more comfortable now with the engine. While I have worked on a

lot of engines in the past, the 92 was a mystery that worried me a

lot. I now know what I would do if the beast quits on the road some

time. I somehow gained a real understanding of the fuel and DEC

system. Just knowing that if the check engine goes out after the 10

second start-up, the DEC is likely OK is a great help. I was so

worried that I had cooked the DEC.



I really appreciate knowing that all you guys are here to make

suggestions and send diagrams when we need them. Thanks again and I

am ready to help with some suggestions now on the fuel and injectors

system.



Larry Kehler

94 PT-40 WBDA "BAM"

St Louis





Was:HELP - 8V92 will not start NOW It runs! - ronmarabito2002 - 06-23-2008 14:26

Glad it is solved and you are running.

R.E. (Ron) Marabito, Dallas, TX 92WB40
Currently in Tolland, CT

--- In WanderlodgeForum@yahoogroups.com, "Larry Kehler"
wrote:
>
> OK Thanks for all the help to everyone that made suggestions.
>
> Today I talked to the old series 92 guru at Detroit Diesel about what
> could cause one bank to not fire. He said it could be several things,
> a clogged fuel hose, a clogged restricter valve or a blown injector
fuse.
>
> I checked the hose for that side by running a long screwdriver though
> it. Then found the two inline fuses attached to the center battery.
> I followed the wires to the center DEC plug. That plug has two green
> wires that go to the battery ground lug. Four orange wires that merge
> into two wires that go to the inline fuses. One fuse is the curb side
> bank injectors power and the other is the street side bank injectors
> power. I wire brushed all the connectors and checked the DEC plug
> wires for 12 volts.
>
> I found that someone had cut a wire off the engine that looked like a
> ground, so I added a ground wire from the engine to the ground bar
> just for good measure.
>
> After purging the air, the old 8V92 fired up and I pushed the high
> idle switch for that great purrrrr.
>
> This difficult situation was a real learning experience. I feel so
> much more comfortable now with the engine. While I have worked on a
> lot of engines in the past, the 92 was a mystery that worried me a
> lot. I now know what I would do if the beast quits on the road some
> time. I somehow gained a real understanding of the fuel and DEC
> system. Just knowing that if the check engine goes out after the 10
> second start-up, the DEC is likely OK is a great help. I was so
> worried that I had cooked the DEC.
>
> I really appreciate knowing that all you guys are here to make
> suggestions and send diagrams when we need them. Thanks again and I
> am ready to help with some suggestions now on the fuel and injectors
> system.
>
> Larry Kehler
> 94 PT-40 WBDA "BAM"
> St Louis
>

Was:HELP - 8V92 will not start NOW It runs! - Larry Kehler - 06-23-2008 14:38

Leroy
I don't know for sure but I think it was the cleaning of the orange
power wires and fuses. The DD guru said that when a power fuse is
blown a bank does not fire but if is a ground short, either even or
odd injectors will not fire. Since mine was a bank short, it must
have been the power shortage.
I added the ground wire hoping to correct my speedometer that says I
am going 20 miles per hour when I am sitting at a stop light.

Larry Kehler
94 PT-40 WBDA "BAM"
St Louis


--- In WanderlodgeForum@yahoogroups.com, Leroy Eckert
wrote:
>
> Ok, if I understand it correctly, it was a ground problem; or was it
corrosion on the fuse wires? Or both? Glad you got her going.
> Leroy Eckert
> 1990 WB-40 Smoke N Mirrors
> Dahlonega, GA
> Royale Conversion

Was:HELP - 8V92 will not start NOW It runs! - Gregory OConnor - 06-25-2008 15:41

Larry, glad you got the bus going. The only reason it even matters
what the problem was is to keep it from happening again. If you
found the problem to be the fuse that is good but if you fixed the
issue by mistake, you don't know if you corrected the result or
repaired the cause.

Not to "beat a running bus" but I cant see 20 seconds of a diesel
running at 600rpm with only 50% or the injectors working???? and if
they all 8 did work for the 20 seconds and removal of 12v shut off
one bank which shut down the engine, both exhaust manifolds would be
identical heat????

I put the fuse on my list of obvious fixes. What is interesting is
Paul&Jo Carver (Cool couple) had problems starting their 93pt
several years ago and it turned out that one of the starter
bateries was bad. Wonder if it was the one linked to the fuses??
Last month or so MrCarver posted that he had simular issues and
found one other problem. wonder if it was related to the battery and
wonder if your center battery is screwed also?????? Could be that
you moved battery cables out of contact then back into contact
while poking around all week and it is an issue waiting to happen
again.

If a guru is someone who tells you twenty things to try and one
works, Im a RockBreaker guru. I beat on a Boulder atop a cliff in
Palmsprings 2,000 times today and it broke.

GregoryO'Connor
RockBreaker Guru

--- In WanderlodgeForum@yahoogroups.com, "Larry Kehler"
wrote:
>
> OK Thanks for all the help to everyone that made suggestions.
>
> Today I talked to the old series 92 guru at Detroit Diesel about
what
> could cause one bank to not fire. He said it could be several
things,
> a clogged fuel hose, a clogged restricter valve or a blown
injector fuse.
>
> I checked the hose for that side by running a long screwdriver
though
> it. Then found the two inline fuses attached to the center
battery.
> I followed the wires to the center DEC plug. That plug has two
green
> wires that go to the battery ground lug. Four orange wires that
merge
> into two wires that go to the inline fuses. One fuse is the curb
side
> bank injectors power and the other is the street side bank
injectors
> power. I wire brushed all the connectors and checked the DEC plug
> wires for 12 volts.
>
> I found that someone had cut a wire off the engine that looked
like a
> ground, so I added a ground wire from the engine to the ground bar
> just for good measure.
>
> After purging the air, the old 8V92 fired up and I pushed the high
> idle switch for that great purrrrr.
>
> This difficult situation was a real learning experience. I feel so
> much more comfortable now with the engine. While I have worked on
a
> lot of engines in the past, the 92 was a mystery that worried me a
> lot. I now know what I would do if the beast quits on the road some
> time. I somehow gained a real understanding of the fuel and DEC
> system. Just knowing that if the check engine goes out after the
10
> second start-up, the DEC is likely OK is a great help. I was so
> worried that I had cooked the DEC.
>
> I really appreciate knowing that all you guys are here to make
> suggestions and send diagrams when we need them. Thanks again and
I
> am ready to help with some suggestions now on the fuel and
injectors
> system.
>
> Larry Kehler
> 94 PT-40 WBDA "BAM"
> St Louis
>