I have been fighting this on two completely different Megashift (GPIO)/4L80E combos that have the speed signal wires very very well shielded and have good grounds.
On the specific setup that I am posting the Tune and log files for the speed sensor drops out at a speed around 45MPH when held consistent and very rarely at other random speeds (Most recent at the 1/4 mile track this weekend at 120MPH). When it drops out at 45 it reads approximately half the speed 22ish which causes a sudden drop out which because of the way the MS works it feels like it goes into neutral.
The truck has a MS3x on a 6.0 LQ4 (LS1) Turbo with a GM 4L80E automatic with a Megashift.
Has anyone experienced this on their Megashift? Hoping James can chime in since he has been working with the megashift lately.
Thanks in advance, Dan
Megashift dropping out speed signal at certain speed
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Re: Megashift dropping out speed signal at certain speed
I've not used megashift, I've used my own trans firmware.
See: http://www.msextra.com/forums/viewtopic ... 23&t=56163
James
See: http://www.msextra.com/forums/viewtopic ... 23&t=56163
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".
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".
Re: Megashift dropping out speed signal at certain speed
James,
I did not realize there is a difference. I guess I will try flashing your code into one of the controllers and see what happens. Will everything else still work correctly as far as the CAN network and the way Tunerstudio interfaces with it?
Thanks, Dan
I did not realize there is a difference. I guess I will try flashing your code into one of the controllers and see what happens. Will everything else still work correctly as far as the CAN network and the way Tunerstudio interfaces with it?
Thanks, Dan
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Re: Megashift dropping out speed signal at certain speed
The user interface is quite different. Maybe Andrew has a tune he could share? EDIT: wrong trans!
James
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".
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".