Bobdog
Well-Known Member
I've saved a data log, Gave it a good thrashing to get the full range of values, just got to convert the file.
sierrafery
Well-Known Member
That doesnt men anything cos it's the ECU's output, it has nothing to do with how the wastegate valve or port is behaving
Bobdog
Well-Known Member
Ah ok, so the live wastegate reading is showing what the ECU is demanding rather than what the wastegate is actually doing?
sierrafery
Well-Known Member
Yes, and that's valid for all the ECU outputs
Bobdog
Well-Known Member
What about turbo manifold pressure? That's got to be an actual true reading hasn't it?
sierrafery
Well-Known Member
If it's the one shown in "instrument" mode it's not 100% boost reading but if all the sensors are OK it should match the real boost as it's calculated by the ECU by extracting the AAP(ambient pressure) from MAP(manifold absolute pressure) ... if you dont make a log and no fault codes are stored just watching the instrument mode can be irrelevant, and also the "inputs fuelling" mode is better than Instrument
Bobdog
Well-Known Member
It was inputs fuelling I was watching, showing live readings from AAP, manifold pressure, egr (zero cos I don't have one) and wastegate modulator. I will make a log, I think I buggered up the first attempt as I turned off ignition before saving it.
sierrafery
Well-Known Member
In the inputs fuelling it's the MAP reading, it should go up to 230kPa under heavy throttle
Bobdog
Well-Known Member
I saw it go up to 222kPa on the run I did.
The wastegate fluctuated between 0-40% in inputs fuelling. If that's relevant.
