Not RPM synced, no fuel pump, no ignition output...

[AaronG]

Megasquirt:
MS3x
Firmware version 1.5.0
https://www.diyautotune.com/support/tec ... mod-motor/ (Hardware mods for MS2 V3.0 board direct coil control w/ distributorless engine)
Powered by V2.2 Megastim at the moment
Map Daddy 4

Car:
2000 Ford 4.6L modular motor
2003 Ford cobra ignition coils
2 quad spark boxes wired in
Factory 36-1 CAS
Factory cam angle sensor
GM coolant and air temp sensors

Issues:
Cannot get RPM signal output
Cannot get fuel pump to prime initially
Cannot get fuel pump circuit to ground under I/O testing, or ever
Not RPM synced light remains red
Ready right remains green
Protocol error light on (New this morning)

I have read all Megasquirt manuals more than once and I'm just at a loss now, especially with the protocol error light. When I first put this board together everything worked, the stim would cause the rpm to react, the fuel pump circuit would ground as normal.

[SwedCharger-67]

I think you need to check why you don't have a rpm-signal. Without sync you won't get anything else.
Check the composite/tooth loggers to see if you get any signals.

[billr]

I think that old-style stim can't output a 36-1 CKP signal, try changing to "basic trigger" in your MSQ.

[AaronG]

I think that old-style stim can't output a 36-1 CKP signal, try changing to "basic trigger" in your MSQ.

Yup, you got it. I've been using this Megastim since the mid 2000's and I forget how much MS has improved. I'm going to have to upgrade that thing.

Now my last issue is, the fuel pump circuit still isn't grounding pin 37. I was hoping that would fix itself when it was sync'ed.