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Engine shut down

Yahoo Message Number: 117694
So I am cruising along nicely then power loss with tachometer and speedometer needles falling to "0" Next I pump the throttle and 10 seconds later, the engine restarts. Where should I look next?? Hoping one of you has had a similar experience.

Richard Mcguinness
01 Affinity 5972 C12 Cat B&B 42

Re: Engine shut down

Reply #1 –
Yahoo Message Number: 117695
Check your fuel filters. I've experienced the same symptoms when sludge had built up and blocked the flow.

Jerry & Brenda Azzara
1999 Intrigue Chefs Delite
#10702

6s

Re: Engine shut down

Reply #2 –
Yahoo Message Number: 117696
I'd agree on this, especially if the filters have been in over a year. You can also try to start the generator. If it won't start, that's a confirmation.

Lee Zaborowski

Re: Engine shut down

Reply #4 –
Yahoo Message Number: 117698
Does the dash loose complete power? Check the 12V supply to the circuit boards from the solenoid in the bay under the drivers seat, also check the connections, nuts holding the 12V supply. Mine had similar symptoms leaving me stranded on the side of the road.

Good luck

mark

Re: Engine shut down

Reply #5 –
Yahoo Message Number: 117708
I have new batteries; a new alternator; new fuel filters; new ignition solenoid; and just replaced all seven relays in the electric bay. My dash remains lit when this occurs. With all the recent discussion of bad fuel lines, I wonder if I could be sucking in air ???

Anyway thanks for all the feedback.

Richard Mcguinness
2001 Affinity 5972 C12. 42 B&B

Re: Engine shut down

Reply #7 –
Yahoo Message Number: 117710
Is it throwing any codes? fuel line sucking air would not be intermittant. Could be a loose ground, injector pump, not sure if the Cummins (I have a Cat) has a throttle positioning sensor that could be on its way to failure

Re: Engine shut down

Reply #8 –
Yahoo Message Number: 117711
I experience a total engine shut-down on Rt. 75 in Florida last year. Had to get towed, etc. Turned out to be a $.85 fuse. The red emergency switch above the engine is a powered switch. Hitting it kills the engine, as does the fuse to the switch failing for unknown reasons. We had all the schematics spread out on 4x8 sheets of plywood to follow this one to the source.

Re: Engine shut down

Reply #9 –
Yahoo Message Number: 117712
Great info about the shutoff switch and its fuse. Could you tell us what year coach and what model as well as the location of the fuse and the wire number?. Thanks again for the info.

Steve 2000 Magna #5784

Re: Engine shut down

Reply #10 –
Yahoo Message Number: 117714
Even with new filters you could still have the problem with them. Bad fuel, is bad fuel filters don't make it better. So keep it on the list as a possible problem.
Go back over the last work done on the coach before you had this problem. If I could tell you the number of time this was the fix.

I gut feel that it sounds like a fuel problem. Much higher pressures are required for diesels vs gasoline engine. I remember one year someone on this site replace 3 sets of filters. Just because you change your filters and added algaecide doesn't mean your filters won't plug up again.

Sincerely

Alex Ritchey 2000 CC Affinity B&B

Re: Engine shut down

Reply #11 –
Yahoo Message Number: 117716
Richard,

I had a similar problem last year. I had my fuel filters replaced and experienced the same problem. The engine (2000 Magna C10) while cruising at 60 mph shut down. I coasted to the side of the road and stopped. I turned the key off and back on and it restarted. I ended up taking it Caterpillar the next day. They used their computer to diagnose a speed sensor problem. As far as I understand, this sensor monitors the crank or camshaft rotation. If it doesn't sense rotation, it shuts off the fuel supply to the engine. There is a backup sensor that is used when you stop and shut off the key. They ended up replacing both along with a fuel pressure valve. The total for parts and labor was somewhere around $900. Since then no problems.

Don
2000 Magna #5854
2010 Honda CRV toad

Re: Engine shut down

Reply #12 –
Yahoo Message Number: 117719
Have we not heard of Fuel Filter replacements where accidentally the old oil ring was not replaced, resulting in fuel starvation problems?

Tossing balls towards the plate, hope one of them is a solid hit:)!
Best,
Smitty
04 Allure 31017

Note: Different coaches may have different fuel lines, but I understand must main engine fuel lines were metal tubing(?). The 'porosity' leaking problems of rubber fuel lines fro ULSD, I thought, were typically to generators and Aqua/Hydro/Hurricane's(?).
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)

Re: Engine shut down

Reply #13 –
Yahoo Message Number: 117724
Had a very similar problem. In my case it was a surprisingly simple solution but a lucky find. Reached under the dash and it was a loose wire on the back of the ignition switch.
Steve 2002 Intrigue 11382

Virus-free. www.avg.com
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Re: Engine shut down

Reply #14 –
Yahoo Message Number: 117725
Cat plugged in and handed me a six page report. There were no issues. Yesterday I was poking around on Y-tube and noticed that the ECU on the engine has two cables that plug in. One of them is a cable to the throttle. Again, as I stated, I can recover power to the engine by pumping on the throttle. Perhaps that is where I should be looking? ? ? ?

Richard Mcguinness
01 Affinity C12 42ft #5972