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Seems like 2 (possibly independent) issues, best noted on 2 separate pages, please update the relevant page. * MembersPage/WolfTm/WidebandIssueAfterUpgrade * MembersPage/WolfTm/LeanAfterFwUpgrade * I may add that this happened after old VEMS ECU was replaced with new (also new fw ?), and never happened in 2500 kms with the old board. '''Current fw is 1.2.38.''' * What was old fw ? 1.2.31 ? * Maybe related to some '''unintentional side effect of upgrade''' ? * important: upload '''old config and new config please''', so we can compare. ** Unfortunately I don't remember the fw you put in the #15379, but I needed to upgrade for the lack of AC request idle up function. ------------------------------------------------------------- '''OLD, solved''' * '''Support for ecu serial #10267''' ** A customer's V3.6 ecu suddendly lost serial number, seems to be in a kind of limp mode (10° and 0.65 lambda at any load/rpm). ** VemsTune is now displaying that Serial is unknown-0. ---- Granting (by info sent in priv), Do you have ISP cable (Parport DSUB25 or USB-ISP ?) Will need to follow http://vems.hu/vt/help/v3/general/bootloader_upgrade.html If considering bootloader upgrade, (so that internal BOD can be disabled) highly recommended: '''PLEASE CHECK THAT v3/10267 has reset chip at the atmega128/pin20 reset''', eg * mcp121 or mcp131 (U26 position) * or mcp809 or max809 (U10 position)''' See GenBoard/VerThree/Schematic eg [http://www.vems.hu/files/genboardv3/v3.8/genboardv3.8_sch.pdf v3.8.pdf] '''----------------------------------------------------------------------------------''' * '''Support required for VEMS EGT amplifier''' Engine off, ambient sensor temp (~20C) * Tested Pin7 DVM output (1V/100°C) and getting 0.7 volts ** corresponding to 70C ** not 6 volts, roughly corresponding to Pin6 2.5 volts. * '''I'm getting 2.5 volts out of Pin6''' (0-5V output, 1V/233.3C) ** '''Thus getting 580°C instead of 20°C.''' Hint: The '''output is almost certainly connected to an input with pullup''' (possibly strong pullup). * '''Diagnostic: disconnect anything from output, and measure DC voltage with DVM''' (the DVM has 1 to 10MOhm input impedance). * '''Solution: make sure to connect pin6 output to an input without pullup resistor''' '''Sensor connection (seems good)''': EGT sensor is K type yellow-red wires: ** yellow = green (plus wire) to board GND ** red = white (minus wire) to the board cathode on corner
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