Quote Originally Posted by phantom309 View Post
I haven't done a koko since i did it when i changed pmd's, i'm not sure why you think the stepper is seized, if i unplug the ect it rattles with lots of timing,. In fact that was the first work around i did. When i start it cold(25f here) it rattles hard till it warms a little and the rpm slows,.
troubles would always start at 175f,. As if a switch had been turned on,. If i were to start the engine at 150 it would behave normal till it warmed a little more.
Nobody seems to have an answer as to why 175f is so relevant to a 6.5,.
There is lots of confusion on obd2 in general on 6.5's.

I can remember being told on another forum that i got banned from my 5068 pump wouldn't run with the chip set for 5521,. That was After i had been running it for 6 months,.

So another 6.5 quirk with a wonky resistor unexplaianed.
I didn't say I thought the stepper was seized... I said: "I would be interested to know whether the stepper is moving." The more likely part(s) that would be subject to seizing is/are the "advance piston" and related parts.

The timing stepper motor pulls up on the pivot shaft to advance fuel injection timing.

Why were you banned on another forum?