Broke down in Albuquerque Cummins not making power

Topic: Broke down in Albuquerque Cummins not making power (Read 2093 times) previous topic - next topic

Re: Broke down in Albuquerque Cummins not making power

Reply #25 – June 02, 2021, 01:23:38 pm

I wonder if the broken wires are shiny-

Re: Broke down in Albuquerque Cummins not making power

Reply #26 – June 02, 2021, 01:56:00 pm

Quote from: erniee – June 02, 2021, 01:23:38 pm

I wonder if the broken wires are shiny-

They are not.

Re: Broke down in Albuquerque Cummins not making power

Reply #27 – June 02, 2021, 01:58:01 pm

Chewed on by rats/mouses?

Re: Broke down in Albuquerque Cummins not making power

Reply #28 – June 02, 2021, 01:58:32 pm

Quote from: Realmccoy – June 02, 2021, 12:47:25 pm

Update:
1: cut open both fuel filters and did not find them clogged. They appeared normal to me for miles, etc.
2. the air filter was dirty, carefully cleaned air cleaner box and reinserted air cleaner. Called two truck parts places and they don't have Donaldson or the Baldwin crossover. Reinstalled to continue with testing. What other air filters would you trust to replace the Donaldson? P148043.
3. I found two wires on the top of the engine intake that are broken. They are attached to two different sensors. At this time I don't know what they do. There are a pair of sensors on either side of the air coming into engine from CAC. One of those pairs is disconnected via broken wire. The wire connects the two sensors. The second sensor connects to both of those sensors via a small tube. This sensor also has a broken wire. Need help identifying these parts as to function.

Top arrow pointing to the broken wire is your intake air temperature fuel solenoid

Re: Broke down in Albuquerque Cummins not making power

Reply #29 – June 02, 2021, 05:22:02 pm

The right arrow points to the fuel solenoid which only is used for cold weather starting, below
freezing. Doug's posting is all about the system so if you use your coach in the cold it is a
good thing to know.

Re: Broke down in Albuquerque Cummins not making power

Reply #30 – June 02, 2021, 05:39:11 pm

Quote from: Twig – June 02, 2021, 07:57:52 am

Most likely the fuel shutoff solenoid is hanging up and not allowing the fuel rack to fully open. It's happened to me. You can disconnect the solenoid and tie wrap it fully open to get full power. Everything will be normal except to shut down you have to cut the tie wrap.

It appears to be the fuel shutoff solenoid. I've ordered an aftermarket solenoid from Amazon that will get here Saturday, $35 vs. $567 with Cummins. they would also have to ship it as none are available in New Mexico. Cummins has an updated solenoid with new bracket, at that price differential going with aftermarket. I test drove the engine and it was still low on power after fixing broken wires and confirming that the King Throttle was giving me full throttle. Stopped during my test drive and manually activated the fuel shut off solenoid and my power returned to normal in subsequent test drive. As Twig suggested, it was not opening fully.

FYI: new Cummins part no.: 4089574. Original number from Quickserve was 3919422 for my serial number. That's the part number I cross referenced. If it works I will probably order a second for a spare.

Thanks all for your assistance.

Re: Broke down in Albuquerque Cummins not making power

Reply #31 – June 02, 2021, 05:42:43 pm

Quote from: oldguy – June 02, 2021, 05:22:02 pm

The right arrow points to the fuel solenoid which only is used for cold weather starting, below
freezing. Doug's posting is all about the system so if you use your coach in the cold it is a
good thing to know.

We do use our coach in the cold, so it will be interesting to see how my coach starts in the cold now after fixing the broken wires.

Re: Broke down in Albuquerque Cummins not making power

Reply #32 – June 02, 2021, 05:44:55 pm

The reason I asked if the wires were shiny, would be freshly cut wire would not have oil/debris on it and would be another issue.

Re: Broke down in Albuquerque Cummins not making power

Reply #33 – June 02, 2021, 05:48:31 pm

When I had a 8.3 engine it would start on the first revaluation down to freezing and
after that it was hard starting. I find the M11 starts better in the cold.

Re: Broke down in Albuquerque Cummins not making power

Reply #34 – June 02, 2021, 05:53:38 pm

For future reference check out Larry B's products on Ebay,he has a fuel solenoid and other parts.

Re: Broke down in Albuquerque Cummins not making power

Reply #35 – June 02, 2021, 07:15:14 pm

Quote from: oldguy – June 02, 2021, 05:48:31 pm

When I had a 8.3 engine it would start on the first revaluation down to freezing and
after that it was hard starting. I find the M11 starts better in the cold.

Perhaps it's because of the heated screen in cold weather. The warmer it is, the faster any diesel will start unless there is a fault in the fuel system.

Pierce

Re: Broke down in Albuquerque Cummins not making power

Reply #36 – June 02, 2021, 09:28:31 pm

The M11 takes a few revaluations to start any time because of the
ECU and it starts down to 15F and colder than that I push the ether
button.

Re: Broke down in Albuquerque Cummins not making power

Reply #37 – June 04, 2021, 05:45:53 pm

Wires on either side of intake manifold input air pipe on our coach are for 12volt intake pre-heater (wait to start dash light)

Re: Broke down in Albuquerque Cummins not making power

Reply #38 – June 04, 2021, 05:45:54 pm

Sorry you are having this problem.

We have same problem with two separate different component failures, not at same time.

Fuel shut off solenoid sticking and not fully opening.

Temp fix is to manually pull up fuel solenoid and hold in full open position with cable ties. Cut cable ties to stop engine.

King throttle control

If tail light brake bulb filaments are broken (brake light not working) King may go into limp mode allowing low RPM driving.

One diagnostic is with bed held open, drive with manual pull up of throttle injector lever to eliminate King throttle.

Re: Broke down in Albuquerque Cummins not making power

Reply #39 – June 04, 2021, 09:21:57 pm

I hope that the new fuel shut off is the problem and corrected with the new unit. I replaced my shut off years ago, and be very careful attempting to get the old bracket off the engine. 3 tiny bolts, and easy to break off. Don't ask me how I know and how long it took to resolve.

And as suggested the test of the manual moving of the throttle with the bed up. I got worried about the King throttle control failing. As a precaution I just last month built a manual hand feed set up. It is a no stretch line from the throttle, up over the foot of the bed, and forward. I put a spacer on the bed platform to allow the line to feed and return freely. Then I drilled my 5' bed safety support pole with a thru hole at the bottom, to tie to the floor accelerator foot feed. Then up from 3' to 4' I pre-drilled a number of holes for the line. The test was to see if I could with the new "hand stick" see if I could control the engine speed and feel I could drive to safety off the highway. It worked well. So now my safety bed support has an attached coiled long line, and the short line for tying to the foot feed. Now I cross my fingers. If it ever is needed, it's a couple of minutes to rig and get going on the road again.

Re: Broke down in Albuquerque Cummins not making power

Reply #40 – June 04, 2021, 09:31:52 pm

With both hands needed for the steering wheel, a manual throttle cable pull lever should be foot controlled. We drove for over a week with a wooden foot throttle board.

Re: Broke down in Albuquerque Cummins not making power

Reply #41 – June 05, 2021, 10:16:55 am

With my 1995 8.3, I also have experienced this loss of power. At first, mine was intermittent, usually after stopping to fuel and then trying to go on down the road. Changed filters just like you. And like Barry & Cindy, I had more than one component failure before becoming an "expert" on this fuel system. The first (intermittent) failure was the solenoid shutoff valve. Just like you, I replaced it with an "aftermarket" model when I got tired of using baling wire to hold the valve open and needing to raise the bed and unwrap this "fix' to shutdown. The second failure was a broken lift pump. I replaced it, but unknowingly broke it during installation but did not learn of this until after replacing the fuel lines and pestering every knowledgeable person on this wonderful site. (I did not know that this engine could run without a working lift pump.) I have also had the King cruise control rebuilt and installed that extra brake line and replaced the air/electric valves up near the windshield fluid reservoir. And replaced the flow control valve (under the air conditioner, how inconvenient!) and installed a fuel flow meter to constantly monitor delivery to the engine. I live north of Taos. Pissed off many drivers who followed me on single-lane transfer ramps and mountain roads until I got all this figured out and fixed. Good luck to you.

Re: Broke down in Albuquerque Cummins not making power

Reply #42 – June 05, 2021, 05:23:40 pm

I've replaced the fuel shut off and the coach has full power. I ran it about 15 miles down I25 at 65 mph. Climbed a hill going south with no problem. However, it doesn't want to turn off. I have to turn the key off twice or more times to get it to shut off. I had to swap out the eye bolt from old to new solenoid because the new one was too small to slide over the fuel shut off butterfly valve. Any suggestions on how to diagnosis or adjust? Making progress but still more or less stuck in Albuquerque.

Re: Broke down in Albuquerque Cummins not making power

Reply #43 – June 05, 2021, 05:56:14 pm

I've lengthened the eyebolt twice and now it shuts down. Going to take it for another run to see if it makes full power. How long after turning off key is normal shut down. Seems like it is taking 1 to 1.5 seconds to shut off.

Re: Broke down in Albuquerque Cummins not making power

Reply #44 – June 05, 2021, 07:04:10 pm

See Section A, Page 38 in Cummins Manual for correct adjustment.
Cummins_8.3_Manual (1).pdf - Google 云端硬盘

This is a video of the replacement of the shutoff valve on an rv:
https://youtu.be/6rNawg7pTgw

This is another video, the 5.9 used the same shut off valve, and so this video shows a good "how to" of this shutoff valve replacement.
https://youtu.be/Hxgvejdomao

Re: Broke down in Albuquerque Cummins not making power

Reply #45 – June 05, 2021, 07:23:02 pm

Thanks. Just ran down the I25 again and it has power and turns off. We are hitting the road again!

Re: Broke down in Albuquerque Cummins not making power

Reply #46 – June 05, 2021, 07:51:46 pm

Quote from: Realmccoy – June 05, 2021, 07:23:02 pm

Thanks. Just ran down the I25 again and it has power and turns off. We are hitting the road again!

I didn't have good knowledge, but I have been listening. Glad you are back at it!

Re: Broke down in Albuquerque Cummins not making power

Reply #47 – June 06, 2021, 06:28:18 pm

FYI, On our engine, the ONLY thing that stops engine from running is to turn off fuel flow.

Fuel shut off solenoid has two internal coils (3-wires: two hot, one ground):

ignition-on to energize small coil, but not enough to move solenoid to open fuel flow

engine-start to energize big coil to move solenoid up to open fuel flow

after engine is started, big coil is de-energized, but small coil will continue to "hold" solenoid up and keep fuel flowing

turn ignition off, small coil is de-energized and fuel shut off solenoid spring will push solenoid down to turn fuel OFF

No reason to be stuck if fuel solenoid fails:

Diagnose by manually forcing solenoid up to open fuel with cable tie. If engine then runs you have a temporary fix.

Cut cable tie to stop engine. This temporary fix can be repeated indefinitely. Fuel solenoid can be reached from an open rear engine door.

Re: Broke down in Albuquerque Cummins not making power

Reply #48 – June 06, 2021, 07:26:27 pm

When I had a Monaco the fuel solenoid quit so I rigged up a spring to
hold the fuel shut off on and then rigged a pull rope to shut off the
engine. It worked great until I got a new fuel solenoid.

Re: Broke down in Albuquerque Cummins not making power

Reply #49 – June 06, 2021, 10:31:43 pm

Good news. Run to our campsite at Manzano Mountain State Park successful. I owe the help and wisdom of this incredible forum a great deal. Couldn't do this without my Foretravel neighborhood. Thank you Barry for the additional information on how this solenoid works. It felt like I had a bit of additional power going up hills.

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