1.8 issue

I have an 08 VVT Jimny with a 1.8L VVT Liana engine conversion using the Jimny Throttle body, Liana fuel rail and Jimny ECU

I had it on a DYNO today and they it has a lean, meaning there is not enough fuel getting through.
He says, worst case scenario this could melt a piston.

Looking at mapping the ECU next week.

He reckons the Jimny ECU will have all the fuel settings to maximum allowed for a 1.3- so he'll just need to raise this level to make up for the fact that its a 1.8L

Does this make any sense? Has anyone else had this issue?

Not having done a swap in a jimny but i would have thought you would need have used the ECU out of the donar car.

I had done one in my e30 BMW from the 2.0 to the 2.5 and we swapped the ECU across.

Not on a jimny but on one of my subaru legacy, I had put the block from a 2.5 into a 2.0 and given it twink heads and a turbo, I had the same issue that the ecu map was fueled for the 2.0 and I had to have it remapped even though it was out of an imprezza turbo. Went like a stabbed rat after though.

i think i may have come up with a solution that doesnt mean remapping the ECU. I'm currently using the Jimny fuel regulator
i'm going to swap and use the liana fuel regulator and see if that makes a difference

I'veheard that the liana fuel regulator give too much fuel to the motor so i might need to chase 1 from a suzuki swift.

parriehunter wrote: Not having done a swap in a jimny but i would have thought you would need have used the ECU out of the donar car.

I had done one in my e30 BMW from the 2.0 to the 2.5 and we swapped the ECU across.

I thought this too. But the liana ECU does not possess 4WD components

jtayl153 wrote: Looking at mapping the ECU next week.
He reckons the Jimny ECU will have all the fuel settings to maximum allowed for a 1.3- so he'll just need to raise this level to make up for the fact that its a 1.8L
Does this make any sense?

No it doesn't make a lot of sense, the 1.8 has a very different torque curve to the 1.3 so a single correction is probably not suitable. There are two things to consider with the ECU (ignoring emissions), fuelling and timing - many people forget timing when they talk about remapping but its very important.
The fuel trims will give you a good idea of how far out the fuelling maps are if you can plot them for different RPM and loads, if they vary by much then a single correction is not going to work very well, a Suzuki scan tool will give you a reading for the knock count which can be used to check timing adjustments. The ECU will have around 120 maps for different circumstances, a lot of which can be ignored but it is important to get the main fuelling and timing maps correct, as well as the fuelling and timing maps for idle and high load enrichment. You should also correct the injector scaling factor to the suit the injector flow but to some extent that can be obviated by changing the other maps - that's just not the 'correct' way of doing things.