Increased voltage at the Fuel Solenoid, as from new batteries, results in shorter Inj PW duration, and vice versa (and, I do like my vices versa:ihih
- that's one reason why we stress grounding and connection issues be resolved first
That's because you're expecting to see TDCO change, Chris - it is not supposed to change unless the
position of the IP has changed, which position PCM measures by moving the OS around the timing disk\rotor between the limits dictated by that position - TDCO is a calculated number based on that position, used to factor any timing changes seen as the OS timing disk\rotor\shaft slowly retards due to timing chainset wear - the distributor cannot change timing, as it's firmly secured to the IP body, which is locked down to the timing cover - the rotor, however, does retard over time\duration, as the shaft is driven by the timing gears off the camshaft by the timing chainset off the crankshaft - if you reread thru the preceeding posts, you may notice I keep stressing positional change, as in replacing the IP, resulting in TDCO change and a new number if the IP was not installed to the exact positional orientation as the previous unit
The automatic change will also occur if you do nothing but replace the timing chainset after beaucoup kmiles - you will eventually hear the rattle change as PCM makes the correction sometime during a period of 50 starts
Now: is that clear as mud (even Canadian mud)?
