cant get ms to react to knock sensor

[nickolai]

I was previously running ms2 v2.885 and now im running v2.890 and i cannot get ms to react to the knock sensor in any way. i set up the system using the instructions layed out at http://www.megamanual.com/ms2/knock.htm i have confirmed that the cpu is indeed getting the signal, about 4.39vdc and if i tap the sensor with a screwdriver the signal does drop. I wired to js4/pin30 on the cpu where i measured voltage at the cpu socket.

my real question is: In megatune do i have to activate knock control someplace other than ignition set-up/knock threshold /settings

I have played with settings under spare port settings but have had no luck at all

any help at all would be appreciated.
thanks

[Matt Cramer]

Could you please post a copy of your MSQ?

[nickolai]

sure

Im also getting a couple of errors when i open megatune
conditional check reference undefined EXPANDED_CLT_TEMP
conditional check reference undefined MAPbaro
conditional check reference undefined 'n2o'

if anyone notices anything

[Matt Cramer]

Sounds like you don't have the new settings.ini file in the right place; this is what is causing the error message in the above post. The settings look OK; was MegaTune registering an RPM value inside the 700-3500 RPM window when you did the testing?

[nickolai]

i was conscious of the rpm,
should i have to change anything under spare ports??

and i didnt mention this but i should have, i was having the same problem in v2.885, that is why i updated the code.

[Matt Cramer]

Spare ports should not affect this. Do you have a data log of the testing?

[nickolai]

no but ill take care of that and post it tomorrow

and thanks for the help,
Nick

[nickolai]

so here is the datalog, during the first 3/4 im tapping the knock sensor with a pair of pliers and at the end i actually disconnected the signal to ms and reconnected it 3 times so i know the signal is going low

thanks,
Nick

[Matt Cramer]

You may need to ground the signal instead of disconnecting the sensor; unplugging the sensor does not ensure the ADC circuit will drop because these act a bit funny if free floating.

[nickolai]

ok this time i did basically the same thing but i grounded the signal wire going to ms from the knock sensor control