Won't start

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

Re: Won't start

Reply #25 – January 10, 2024, 09:40:08 pm

Quote from: dsd – January 09, 2024, 10:19:18 pm

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

second link $1095

Re: Won't start

Reply #26 – January 10, 2024, 10:34:01 pm

I think Rudy had some ECM work done at a well know place in Santa Fe Texas , I think it was this place...Maybe Rudy will chime in.

ECM King - Heavy Duty Truck ECM Rebuilders & Remanufacturers

Keith

Re: Won't start

Reply #27 – January 11, 2024, 09:30:54 pm

Still working on getting the connectors off the ECM.

Re: Won't start

Reply #28 – January 12, 2024, 07:32:42 pm

EMC king said to use dish soap and I finally go one connector of so two to go.

Re: Won't start

Reply #29 – January 12, 2024, 07:49:33 pm

Quote from: oldguy – January 12, 2024, 07:32:42 pm

EMC king said to use dish soap and I finally go one connector of so two to go.

What size is the allen wrench for the screw holding the connectors together?

Re: Won't start

Reply #30 – January 12, 2024, 07:52:11 pm

No Allen wrench on mine. 7mm hex head bolt.

Re: Won't start

Reply #31 – January 14, 2024, 09:35:26 pm

Still working on removing the connectors. It's been a bitch and I hope I can get them off and
get the ECM back so we can go to Q

Re: Won't start

Reply #32 – January 16, 2024, 03:42:41 pm

Finally got the connectors off and have shipped the EMC off. The last thing I used was salt and
water.

Re: Won't start

Reply #33 – January 16, 2024, 08:41:08 pm

When I saw "Won't start by oldguy" I didn't notice the "by" and thought for a minute that it said "won"t start old guy." I'm an old guy and I sometimes have a hard time getting started.

Sorry if some of this looks like a link.

Re: Won't start

Reply #34 – January 18, 2024, 11:41:56 am

The ECM is fine so I will get it back tomorrow or Saturday. So I'm still in the dark.

Re: Won't start

Reply #35 – January 18, 2024, 01:58:18 pm

Quote from: oldguy – January 18, 2024, 11:41:56 am

The ECM is fine so I will get it back tomorrow or Saturday. So I'm still in the dark.

Have you looked at the fuel system as a possible source of the problem? I had a similar issue with my ISL 8.9, and I originally spent a lot of time checking for electrical issues but the problem turned out to be the fuel pump. While your fuel system is different from mine, I imagine you could still have a problem with fuel delivery.

Re: Won't start

Reply #36 – January 18, 2024, 02:34:43 pm

I have the Fass System and I had good volume to the secondary filter and changed it and the
fuel that I dumped out of the old filter was really clean. The problem first started with the wire
going to the ECU had come off the relay so no power to the ECU.

Re: Won't start

Reply #37 – January 18, 2024, 02:44:00 pm

Do you think you're getting adequate rotational speed? Are you seeing any fuel vapors coming out of the tailpipe? Are you getting power to the fuel solenoid on the pump?

Re: Won't start

Reply #38 – January 18, 2024, 05:54:40 pm

While you have the ECM disconnected, have you checked the voltage at the power pins on the harness? Pin 39 is the ECM logic power, without that the ECM doesn't do anything. I think the wire you first addressed fixed this since it started communicating with the Silverleaf again. The other 4 pin connector is the main power that it uses to fire injectors and actually do things. I'd check that you have good voltage there. The ECM isn't part of the start circuit, so it will crank over even with the ECM missing. It just won't start without the ECM.

Re: Won't start

Reply #39 – January 18, 2024, 07:05:26 pm

That's a great drawing but I don't think it is for my engine. Before when trying to start the engine
I used a separate battery for the ECM to try and start it. I wander how many amps the ECU use as
I could but an ammeter on and check it.

Re: Won't start

Reply #40 – January 18, 2024, 08:28:06 pm

It's a generic drawing for that ECM. Not all sensors and connections are used in all applications, but the power pins are right.

Re: Won't start

Reply #41 – January 18, 2024, 11:06:34 pm

My connections only go to 20 pins in all 3 connectors.

Re: Won't start

Reply #42 – January 19, 2024, 12:13:08 am

Quote from: oldguy – January 18, 2024, 11:06:34 pm

My connections only go to 20 pins in all 3 connectors.

What does your ECM look like the illustration in kgrover's PDF?

That schematic is for an ISB engine. I think your engine is a ISM.

Re: Won't start

Reply #43 – January 19, 2024, 10:17:56 am

Yes I believe the ISM is a M11

Re: Won't start

Reply #44 – January 19, 2024, 10:59:43 am

Quote from: oldguy – January 19, 2024, 10:17:56 am

Yes I believe the ISM is a M11

Yes early was M11 later was ISM. Nothing to do with ISB, ISC, ISL completely different engine

Re: Won't start

Reply #45 – January 19, 2024, 12:25:09 pm

Try this one.

Re: Won't start

Reply #46 – January 19, 2024, 12:48:31 pm

Quote from: oldguy – January 19, 2024, 10:17:56 am

Yes I believe the ISM is a M11

Can you post a pic of your ECM?

Re: Won't start

Reply #47 – January 19, 2024, 01:35:00 pm

When it gets back.

Re: Won't start

Reply #48 – January 19, 2024, 02:14:58 pm

This is a schematic for the ISM that is in my U320, the fuel system is a CM570.

Re: Won't start

Reply #49 – January 19, 2024, 03:06:31 pm

The fuel solenoid works. I'm not getting power to it with the key on. Is the fuel solenoid wired through
the ECM or direct wired.

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