Quote:
Originally Posted by DaanBMW
OK, I'm still unclear about all this. here's why. (Oh, and I've been only talking about disconnecting ESS not the VVT motor)
- max lift -> AFAIK max lift should correspond to max opening of the valves. if so, why is this a must ? or is it just better (for like better cylinder filling) ? either way, why ?
- max, min, or in-between lift -> since these are gas engines with relatively low compression ratios, I would think any valve lift should work. meaning than even at max valve travel there should no danger of the piston hitting the valve in fully open position. is this accurate ?
- since this is just a short-term test, and assuming 2 above is accurate, why would it matter if when I disconnect ESS my vvt motor had eccentric shaft in max valve lift, or min lift, or in-between lift ?
- is the disconnecting the ESS even in fact disabling the VVT motor ? again all is working on my car, what I want is to disable the VVT on the car in order to troubleshoot, and all I seem to read is that disconnecting ESS will do this but I'm still unsure if that's true
- is all this maybe not related to any of the above, and possibly to something else ? like say (and these are just my speculations) with the DME accepting a non-working ESS only upon seeing the eccentric shaft in max valve lift ?
tuners or people with a better understanding of the relationships involved in vvt, can you pls chime in |
The ESS IS the VVT motor. It is integrated. Unplugging ESS is the same thing as unplugging the VVT motor that drives the gear that turns the eccentric shaft. Only in the case of a failed sensor can the DME still rotate actuate the valvtronic motor to set the eccentric shaft to max lift. There would be different fault codes in that case compared to what you get when you unplug power from the entire unit lol