Hello guys,

I used to tune an aftermarket management but now I want to learn to tune OEM ecu's.

For a start I have an AGU 150bhp engine with big turbo Garrett GT3071R. I change all the ecu related parts sensors,injectors,coils,and wiring so I can use an \ECU from a BAM 225hp engine so I have the wideband sensor and the flexibility of the ME7.5 vs ME3.8.
First of all I cancel the fault code of the VVT cause my engine doesn't have it and the EGTwhich I don't have.

My problem is that I start the car and I have an engine load at idle 40-60% and injector opening at 6-8ms which is way too much for an idle. The maf reading is also higher than normal. I check with MAF disconnected and have nothing changed. How is the engine load calculated except from MAF reading is any map I have to alter to get a right reading.

As for the VVT I only remove the dtc which I'm sure is not the only thing I must alter. Where I can find the map of the VVT so the ECU don't expect the timing change. Is my high engine load start from wrong valve calculated timing?

Hello again,

By now I rectified all my problems the car work fine and is time to modified fuel.

As my injectors and MAF is OEM of the BAM as the ECU I believe I want made any changes in there maps.
So we only have to alter the Lambda maps and driver request load to made the fuelling right? What the needed maps for the final VE tables?

I make logs with VCDS (lambda at channel 31, rpm, load, injector duty...) Is this the only solution or is there anything better