Megasquirt Tach sig disappears

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Jun 28, 2007 | 11:13 AM

#26

muythaibxr

MegaSquirt Mod

Joined: Sep 2004

Posts: 4,721

Likes: 1

From: Maryland

Quote:

Originally Posted by newmanmullen

One that comes to mind is when changing the cranking PW% at say 20c and try to burn value the setting would take fine. But when I had tryed to change any other values in addition to the 20c say at 35c the 20c value would remain changed but the 35c value would not take to ecu after burn. I had also tryed to generate a curve in wich I would enter the values and hit ok with no result.

You must move to the next setting for the one you just changed to take effect. This is a megatune bug, and not a firmware bug.

Quote:

Second one: After mucking with various settings (not including calibration) for a period of time my mat sensor reading would flake out. I would have to reload the default settings/reboot and then reload my saved settings/reboot to remedy the problem.

I have not seen this happen before. Any idea which settings?

Ken

Jun 28, 2007 | 02:30 PM

#27

newmanmullen

Thread Starter

Junior Member

Joined: Apr 2007

Posts: 15

Likes: 0

From: virginia

[QUOTE=muythaibxr;7088083]You must move to the next setting for the one you just changed to take effect. This is a megatune bug, and not a firmware bug.

Thanks for the reply Ken.
I will try this workaround this evening.

As for the mat sensor flakiness:
I have not experiance this in the past two days. I cannot seem to reproduce this one.
Note: This vehicle was built from scrach. All the wiring has been recreated from sifting through the factory wiring diagrams.

I have been experencing strange anomolys with megatune.
After studing the wiring diagrame last night I had noticed I had overlooked a cap/condenser that hangs off the positivre side of the leading coil. This may be the culpret of alot of my problems.
I will be dropping an o-scope on the power side of the MS to see if there is excesive noise on the line.
Hopefully this will resolve some of my issues.

Stay tuned...

Newmanmullen

Jun 28, 2007 | 05:30 PM

#28

newmanmullen

Thread Starter

Junior Member

Joined: Apr 2007

Posts: 15

Likes: 0

From: virginia

Question:
I had stated earlyer in the post I have my tps grounded meaning, I have the sig of tps grounded. I am having problems with the tps accell flickering.

I had taken Renns advice and tryed to increase the tpsdot with no success.
Tps still flikers in megatune. I would assume this is what is giving me my rough idle.
I had checked ground with a meter and ground is excellent.
Is there anything else I should be checking?

Thanks

Jun 28, 2007 | 08:27 PM

#29

renns

Rotary Enthusiast

Joined: Oct 2001

Posts: 1,022

Likes: 4

From: Ontario, Canada

Sounds very odd. TPS should be dead steady if grounded. Do you have a datalog and msq posted? Could you verify you have tps-based accel, and not map-based?