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Still no start?

Go to your local semi truck parts house, they will have the mpu, tell them, 2003 peterbuilt 379 vin 3d588760, 18 speed tranny speedometer sensor or jazz hands the googler if you want to wait. As long as the mpu is long enough, the threads are correct, any mpu will work, all a mpu does is...

Guy says k2 is on big e auction site,

It does look rubbed, i would get another for sure, but that one may still be serviceable. Did you test it before removing?

Just a word of warning, if you remove that governor actuator, you will learn new wordy dirds getting it back together correctly, its a spring, a side slide movement and forward movement.. if I remember correctly. also there should be oil behind the plate its mounted to, check and make sure...

I have cleaned up a few relays and made them fully functional again. Verify k2 is grounded properly by cleaning paint off where the mounting bolts are. the fuel shut off/throttle contol wont do anything until he mpu says the motor is turning, i would verify mpu is functional and adjusted properly.

Mpu is first culprit everytime on a no start, even if you know it only ran out of fuel. Ac voltage should be less than 3.0 but more than 2.0 vac Hand primer pumps are notorious for leaking, failing to maintain prime. intermittent cranking sounds like starter, attempt tapping on starter with...