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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. ------------------------------------------------------------- '''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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