2002 350 mag mpi towsport ser# OM310754 no spark

[lilhuff]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

Thanks Don S for all of your help. I greatly appreciate it. I will let you know what they find. Happy Mothers Day!

 

[achris]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

You're using manual #36. I've looked at it and...

On the tacho, the diagnostic software (I assume 'Diacom Marine') you have can simulate a tacho signal. Use that the check to ensure the tacho is working, and not grounding... (anyway, the tacho signal comes from the ECM, not the coil...If the tacho was faulty it wouldn't stop spark)...

From what I see on the diagrams, there shouldn't be much difference between the MIE and Bravo ECM, apart from programming.

If you have access to an oscilloscope probe connector B, pin 23. That's the coil signal. It's the same on both ECMs...

HTH,

Chris......

 

[lilhuff]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

Thanks Chris for the reply. I do not have an oscilloscope. Would a multimeter on frequency tell me anything? If so how would that connection be made? If the ECM had an issue would it show up on the diagnostic read?

 

[achris]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

DMM on frequency MIGHT work... The problem is it's not a sine wave, it's a short duration pulse, so an RMS frequency meter might not detect it... You would connect into the back of the connector on the ECM...

Depending on the issue... It may or may not show...

 

[lilhuff]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

Thanks Chris I will try this tomorrow after work.

 

[lilhuff]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

achris thanks for the reply. After checking it I believe the CPS is working. I do however think I have possibly found my problem. A friend of mine told me to check the CMPS Cam shaft sensor. Which is in the distributor but not connected and does not have a connector in the wiring harness for it. Thanks to Don S I have a 2006 Manual #36 and a 2002 #36 manual. After going through both wiring diagrams in the manuals evidently sometime between 2002 and 2006 they added the option a CPMS along with the CPS. I believe that since the ECM I am using is from a 2005 it might be looking for a CPS and CMPS signal and since it is only seeing a CPS it is not firing the coil.
Since it looks like the only difference in the 2 is the addition of the CPMS is it better to try and add the signal to the existing set up or try and see if it is possible to get the ECM re-flashed with the correct non CPMS program? Does anyone know who would be able to re-flash a 555 ECM?

 

[achris]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

Just had a look at the manual again and noticed something worthy of mention...

In the 2002 edition, page 3A-12... Shift Indicator and Interrupt... There's a jumper for the Bravo drives... Do you have that plugged in? If you don't the ECM will think the interrupt is tripped and will stop the engine firing....

Just a thought...

Chris.....

On the CMPS... I have a 2006 MPI and there is no connection between the dissy and the ECU... (If I'm reading what you're saying correctly)

 

[lilhuff]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

Yes you understood what I was saying on the CMPS.
In the 2006 manual it has 3A-16 Ignition System without a Cam sensor and then 3A-17 Ignition system with Cam sensor. So I thought it may be possible that the 2005 boat the ECM came from could have been form a system with a cam sensor.

I see what you are pointing out on the Bravo drive on 3A-12. Since the boat and harness are an MIE inboard would this be jumpered? It looks to me like the jumper is installed for the bravo wiring harness. Or are you saying that the jumper should be installed so the ECM thinks the drive is OK? If so would you know where that jumper is located color wires anything to try and locate it?

 

[achris]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

Just found what you are talking about... It looks like the unit WITH cam sensor have its input to the ECM on pin 10 and the CPS to pin 5. The models without the CMPS have the CPS output to pin 10. Could you check to see which pin your CPS output is going to? If it's 5, it might work if you change it to 10....

 

[lilhuff]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

I believe it was B5 I will have to re-check it to be sure. Do you think just changing the pin to b10 would work or do you think it is looking for a signal from both B5 - CPS and B10 CMPS? Either way I guess I could try it and see what happens. Do you know if it is possible to have the ECM re-flashed?

 

[achris]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

I don't know if the ECM can be reflashed. I haven't seen anywhere that advertises being able to do it... I'm sure if it could be done SOMEONE would have worked it out by now.

As for changing the signal to B10, I suspect it will work....

Chris........

 

[lilhuff]

Re: 2002 350 mag mpi towsport ser# OM310754 no spark

Achris and Don S I really want to thank you for your time and knowledge. I now have the boat running. The problem was the ECM. Even though it is for the correct motor it was looking for a gear select signal. Changed out the ECM and it fired right up. I have not ran it long because the gauge cluster that has the rpm, oil pressure and temperature is not working. I took it apart cleaned it with electronics cleaner and cleaned all of the contacts and it still does not respond with the key in the on position or with the boat running. It lights up and the other gauge cluster is working so I am pretty sure it is the gauge itself. Does anyone know where I can buy a Faria GT0030B gauge?