Megasquirt resets always when boost comes up. Usually hits about 150kpa. It resets just when turbo starts to spool. It also resets sometimes at idle. Idle resets were cured for a moment when changed plugs from Denso to NGK but they came back when I tried an other wasted spark coil today. Car free revs to the rev limiter.
I have used many ground wires and megasquirt is grounded at engine block. Sensors are grounded at megasquirt. +12V comes straight past car's original fuse box to a better fuse box and to megasquirt's relays. There is a radio interference suppressor at megasquirts +12v.
Wasted spark coil is Bosch 0221503407 and there is a capasitor in coil +12v. I am using two BIP373 as in this manual http://www.diyautotune.com/tech_article ... squirt.htm They are located near the coil outside of the MS box and grounded to firewall. Plugs are 5k ohm and spark plug connectors also 5k ohm.
Injectors are high resistance so no injector PWM. A cap is added to injector driver to stabilize the voltage.
Taking connector of the PWM idle valve doesn't cure the problem.
The MS 1 itself has ONE weak spot for resets. Pin 6 on the CPU, which is Inverse reset ( Pull the pin low and MS resets, even for a microsecond pulse that goes to below some 1,3 V. The pin is held high by an internal pullup resistor in the chip, and the equivalent R is several MegOhms. An easy fix/safeguard is to install a 100 nF polyester cap between pin 6 and pin 2 ( which is ground)of the CPU. This will make the energy required to create a reset much higher, and radiated emissions will not be able to do that in a typical car environment. Have used it several times with good result. Any good quality 100 nF 10 V cap with 5 mm lead spacing will do.
^^These capasitors are also installed.And if you run the MS1 CPU:
Go for the added 100 nF caps ( 4 off, solder straight on the the
processor socket pins) Pin 1-2 , 2-6, 19-20 and 31-32)
Try to get 100 nF caps with leg spacing of 2,54 mm, then they fit real nice , except for the
2-6 pin cap, which straddles 3 pins.Voltage rating of 10 V is OK, higher does not hurt.
But kep them physically small, maybe also a dab of glue to keep them from vibrating.
Plugs, plug leads and the coil are replaced, so problem might not be there? D11 diode is replaced, because when assembling, I installed it wrong way for a moment. I have reflashed the firmware and now using HR10G, but also tried the normal extra code.
New processor comes maybe next week.
Megasquirt was in bootloader mode. When I lifted Q12 middle pin, I damaged the board and 12V was not going to R3 anymore and that makes it to go to bootloader.