How the ECU knows the gearbox is in 1st/2nd gear or 3rd & up

AvivB

New member
MWP":1lwjjhe7 said:
AvivB":1lwjjhe7 said:
If the throttle is open so there is no more vacuum... :)

... thats why there is a TVIS vac reservoir.
It can be activated without there being vac in the inlet manifold.

Yep, I'm well aware about the TVIS vacuum reservoir...
It activated at low rpm and released at 3k rpm so it need something to keep it open at the beginning of the acceleration when throttle is wide open (in some cases).
 

zf_165_gt

New member
the engine load: He meant it depends on the AFM readings and engine rev at that time.
and yeah the ECU senses car speed. the highest sustained engine loads are recorded when the car moves faster, it could be only engine load related. we could prove that with readings :twisted:
 
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