Quote:
Originally Posted by Kodename47
Thanks guys, I think I'm getting my head round it. Questions:
I have not changed injectors, so is there any need to do full PI/DI sweeps? From this I can just run full open loop to dial in the MAF, correct?
Injector latency, again no need to be concerned? How do you calculate that?
Changing PI/DI ratio will have an affect on AFRs? If I do this with no injector change, is can this be overcome by pure MAF scaling?
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I think it is worth doing PI/DI sweeps on stock form.
My car, stock runs ok, but was dropping IAM at part throttle cruise.
Stock DI/PI trims attached; analytic conditions: Daily driving, dMAF/dT < 0.2, ECT >85C, Closed Loop plot of total trims against MAFV.
The curves come together in the low MAF range because at warm idle, DI is used.
I tried touching latency but found that mine was fine stock (change in 0.01 increments, even 0.02 put my PI curve shape off)
I've corrected for around a 3% Port error and the car is much smoother, need to do more testing to verify it works before I post my method (many thanks to JamesM for hints).