Issue
IGN output behavior changes with RPM and # of cylinders.
- Firmware 1.0.23, Megatune r27 and r30 all show same results
- Firmware is precomiled from website version 1.0.23
I found this issue when attempting to functional check a unit prior to configuration. Initial reports suggested that it was a bad trigger signal (benchtop generation). Resolved this problem and now can generate a proper 60-2 wheel VAG style without any wheel count errors.
Description of issues
- Given: [MembersPage/GrmRacer/TurboSetup/TurboConfig Config] firmware, and tables
- Issue is a function of # of cylinders, RPM, and default Megatune IGN output behavior.
- Under Idle conditions, ie. < 1500 RPM for a wasted spark ( 2 outputs alternating) works fine for any setting. If the RPM goes above a threshold (41Hz for 4 clyn, 29Hz for a 8 clyn). the output changes to include other non-configured output.
Current experiment
Reflash VEMS v3.3 with new firmware 1.0.23 first then use the latest release.
Firmware version 1.0.23 as downloaded from filethingie
- no recompilation done
- configs & Table changed using MegaTune (r30) only
- pretending to be end user trying to get board setup
- I also don't want to go thru the toolchain setup to do it.
Problem is that the number of outputs driven changes when a factor of RPM and # of clyns and #of IGN outputs selected
Original configuration to find problem
Basic description is the Ingnition outputs were set in
Ignition Settings
Outputs to use in h[2] set to [7..0]
- Ingnition ouputs set to
- 0 Drive00
- 1 Drive01
- 2 Drive02
- 3 Drive03
- 4 Drive04
- 5 Drive05
- 6 Drive06
- 7 Drive07
- above 41Hz(~2500rpm) with an 8 clyn setup
- above 29Hz(~1650RPM) with a 4 clyn setup
if Ignition Settings
- outputs to use in h[2] is set to [1..0] symptom goes away.
if Ignition Settings
- outputs to use in h[2] is set to [2..0] three outputs trigger above 41Hz(4clyn)
if Ignition Settings
- outputs to use in h[2] is set to [3..0] four outputs trigger above 41Hz(4clyn)
- outputs to use in h[2] is set to [7..0] 8 outputs trigger above 41Hz(4clyn)