Won't start

Topic: Won't start (Read 2901 times) previous topic - next topic

Won't start

January 07, 2024, 05:15:05 pm

M11 won't start. I believe it's electrical as I'm not getting any data from the engine ECU
but the transmission is giving me data on the Silverleaf. Any ideas and anybody got a wiring
drawing for the ECU

Re: Won't start

Reply #1 – January 07, 2024, 06:38:02 pm

I found a problem. A wire was off the relay that feeds the ECU so I now have data on the Silverleaf
but I can't reset the problem with the Silverleaf.

Re: Won't start

Reply #2 – January 07, 2024, 08:02:32 pm

I finally got the the fault cleared and it still won't start. Changed the fuel filter still no go.
Any suggestions would be helpfull.

Re: Won't start

Reply #3 – January 07, 2024, 08:22:24 pm

Just to be clear the starter is turning the engine over but it won't fire and run.

Mike

Re: Won't start

Reply #4 – January 07, 2024, 08:25:22 pm

Do you have the self priming fuel filter set-up? I changed the fuel filter a week ago and had to prime it twice to get it to start same thing 4 days later. I am hoping that when I drive it all the air will get purged out.

Re: Won't start

Reply #5 – January 07, 2024, 08:32:04 pm

Took me some time to find this old post but this might be worth a check.
Cummins M11 ECM Fuses
Mike

Re: Won't start

Reply #6 – January 07, 2024, 08:54:23 pm

The engine is turning over fine Mike and I have the Fass system Chuck so it is primed fine and
I've checked the fuses Mike. Thanks for the suggestions. I've stopped for the night and hopefully
something will come up.

Re: Won't start

Reply #7 – January 07, 2024, 09:02:25 pm

Just a thought

Have you checked the plug on the cam sensor? If the sensor is oily you might try changing that out.

Mike

Re: Won't start

Reply #8 – January 07, 2024, 09:40:18 pm

Quote from: Pamela & Mike – January 07, 2024, 09:02:25 pm

Just a thought

Have you checked the plug on the cam sensor? If the sensor is oily you might try changing that out.

Mike

Cam position sensor should have an associated code.
Have you tried to start with silverleaf disconnected ?

Re: Won't start

Reply #9 – January 07, 2024, 10:12:29 pm

Quote from: Pamela & Mike – January 07, 2024, 08:32:04 pm

Took me some time to find this old post but this might be worth a check.
Cummins M11 ECM Fuses
Mike

I have 2 15 amp ECM fuses at the start battery.

Re: Won't start

Reply #10 – January 08, 2024, 04:22:14 pm

Went out this morning and tried again and this fault showed up on the Silverleaf
Engine SID 251 52 power supply Low voltage

So I have a low voltage somewhere?

Tim I see two 5 amp fuses but can't find them.

Re: Won't start

Reply #11 – January 08, 2024, 06:26:59 pm

Quote from: oldguy – January 08, 2024, 04:22:14 pm

Went out this morning and tried again and this fault showed up on the Silverleaf
Engine SID 251 52 power supply Low voltage

So I have a low voltage somewhere?

Tim I see two 5 amp fuses but can't find them.

Are you referring to the two 5 amp fuses on the far left of the schematic? If so, I don't know where they are located. I do not think they have anything to do with the ECM.

The two 15 amp ECM fuses are attached to the positive post of the start battery.

Re: Won't start

Reply #12 – January 08, 2024, 07:36:53 pm

Ok I forget about the fuses Tim. I have two wires off the battery, one has a one amp fuse and
the other is not hooked up to anything. So I guess I need to find were those two wires are.

Re: Won't start

Reply #13 – January 08, 2024, 10:48:06 pm

Quote from: oldguy – January 08, 2024, 07:36:53 pm

Ok I forget about the fuses Tim. I have two wires off the battery, one has a one amp fuse and
the other is not hooked up to anything. So I guess I need to find were those two wires are.

Here is a pic of the fuse holders, they both connect to the positive batt terminal.

These are the 15 amp fuses shown in the schematic.

The schematic is for a ISM CM570 ECM

Re: Won't start

Reply #14 – January 09, 2024, 11:26:46 am

Check your engine battery ground.
My top clamp was worn so bad it would not establish good ground.

Re: Won't start

Reply #15 – January 09, 2024, 01:57:50 pm

I went out and check the two wires from the battery and one is for the voltage regulator and
the other is a wire put in by previous owner which I removed as it isn't hooked up.

The Silverleaf now shows no faults.

Re: Won't start

Reply #16 – January 09, 2024, 02:16:04 pm

Could I have a bad ecm

Re: Won't start

Reply #17 – January 09, 2024, 06:33:15 pm

The low voltage condition has been corrected? See Erniee above.

What about fuel?

The fuel pump outlet line attaches to the top of the fuel pump. If you crack the fitting open while cranking you should find a robust fuel leak.

If not:

To the right of that line is the fuel shutoff valve. It has a wire attached to it. With the key on, remove the wire. Measure for 10.5v min. to ground with the key on.
Assuming the voltage is good, touch the wire to the valve's lug. You should be able to hear, and or feel the valve actuate.
If not replace the valve.

Good luck

Re: Won't start

Reply #18 – January 09, 2024, 07:55:09 pm

I talked to Cummins today and ECM King and they both said the battery in the ECM
is dead.

Re: Won't start

Reply #19 – January 09, 2024, 08:45:51 pm

Quote from: oldguy – January 09, 2024, 07:55:09 pm

I talked to Cummins today and ECM King and they both said the battery in the ECM
is dead.

I was told at one time such a battery existed then later was told it is only a myth. Mine ended up being a platform failure. To this day I dont know about the battery idea. I would think that if there was a battery they would be able to quote a price to replace, but no one does it. I look forward to what you find out.
I did reach out to these people and they said that this ECM could be programmed for our coach.

Programmed Fits Cummins ECM Engine Computer Module 3408501 | eBay

It used to be a NEW ECM cummins Made in CHINA but under the cummins name and branded. It now is unbranded CHINESE Been real interested in it but cautious. For what it's worth my replacement overhauled ECM came with A life time warranty and has works flawlessly but also has like 950K miles on it. I dont believe they overhaul as I know of being overhauled and has always been on the back of my mind. They probably do clear and reflash, but I think that all they do, others will disagree with what I have said.
Scott

RE-READ CURRENT AD. NOT CUMMINS BRANDED ANYLONGER

Re: Won't start

Reply #20 – January 09, 2024, 08:56:50 pm

Who overhauled you ECM

Re: Won't start

Reply #21 – January 09, 2024, 10:19:18 pm

Quote from: oldguy – January 09, 2024, 08:56:50 pm

Who overhauled you ECM

I originally spoke with KING but they required a core and I knew my was junk. Was during COVID and the single only one I could find was threw GOECM

GoECM | Automotive Control Module Repair and Remanufacturing Services

Cummins ISM ECM 3681405 – GoECM

In stock with 500$ core
Price went down $25

Re: Won't start

Reply #22 – January 10, 2024, 11:06:28 am

What was the price of the ECM

Re: Won't start

Reply #23 – January 10, 2024, 05:13:26 pm

Having a lot of trouble getting the connectors of the EMC. They are frozen on and don't budge.
Any body have this problem and what was the solution.

Re: Won't start

Reply #24 – January 10, 2024, 05:17:52 pm

Not on ECM's but other frozen connectors Kroil or 50-50 trans fluid acetone mix has helped on other connectors. It penetrates.

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