Quote:
Originally Posted by oldbeaver
Basicaly, the fuel injected is governed vía ELR actuator in the back side of the injection pump, where more voltage means more fuel and less voltage means less fuel. Very useful information.
To me is very clear that ELR controls fuel injected. You want to combine it with the rack position sensor signal. Question: Is it L7?
Second, I suppose this voltage controls VAC transducer (Y31) which is the effector for .... what? The turbo somehow?
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Your pump is controlled by two factors:
1. gas pedal linkage - it's setting up rack position - thus main fuel dosage
2. ELR signal - it's changing by some percentage fuel dose to meet value counted by ECU, based on all the sensors
So you have to know rack position adt its offset by ELR signal, then you have the exact fuel dose. Combining that with rpm signal you have the exact moments when you have to measure rack position and offset. Lets call that a trigger signal. And finally combining that with VSS signal will give you FE.
And the other question about Y31 - I presume that's a valve for EGR