FAQ: 65535 rpm and pulsing fuel pump - what's that?

All questions about MS2/Microsquirt/Microsquirt module. See also MS2/Extra manuals

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jsmcortina
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FAQ: 65535 rpm and pulsing fuel pump - what's that?

Post by jsmcortina »

65535 rpm displayed and a fuel pump pulsing on and off is the code telling you that you have made a configuration error in your settings.

It has NOTHING to do with the hardware, so don't start cutting wires or questioning sensors or anything like that.

FIX YOUR SETTINGS.

The most common errors are a conflict on output pins, e.g. you have stepper idle enabled but also set a tacho output on the same pin. It is impossible to use the same physical pin for two things so the MS2 stops and tells you there is a configuration error.

TunerStudio will often pop up a message box showing you what the configuration error is.
If you are seeing 65535 rpm, but no message, go to Communications and Mini Terminal. Then turn your Megasquirt off then back on again. You will see a message displayed telling you why the code found a problem with your settings.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
jsmcortina
Site Admin
Posts: 39585
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: FAQ: 65535 rpm and pulsing fuel pump - what's that?

Post by jsmcortina »

Note that in recent firmwares the rpm includes the error number so anything > 65000rpm is still a config error.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
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