Yesterday, i booked a dyno to do a few pulls while i was remapping my ecu.
Basically, my targer was to do a few pulls with different fuel and ignition numbers (adding/reducing for both main maps), for my final paper research part.
Please note my g40, is totally stock.
I went to the dyno, they strapped the car and they fitted a LM2 wideband sensor at the exhaust tip.
At the firsth run, i got 112 hp and 165NM of torque (I was really impressed about the numbers, i didn't expect to make this kind of power/torque after 250.000km with a shitty g lader (with 0,5bar peak boost)
BTW....
The first thing that we noted was the AFR graph (at the first run)
It was unstable from 5300 till 5800
At the first 3 runs i made.
The red lined graph is stock
The green lined graph is leaner fuel values
The blue lined graph is richer fuel values.
The weird thing was that the more fuel i dialed the more unstable the map was (from less rpm)
Run after run AFR after 5000RPM was getting leaner and leaner
Adding ignition made no difference... NONE unfortunately.. Seems that the ecu was pulling back degrees of ignition
At he final run i got these numbers and a huge drop of power.
After a dissapointing reacerch,
I came to a conlution about my problem...
1)Faulty fuel pump
2)Faulty power supply to he pump
3)Dyno guy's broken wideband (I have a AEM wideband and it doesn't do show that it leans at this rpm values, thats the weird thing. Maybe mine wideband is broken?)
4)Some sort of problem in my emulation tools?? (I dont think so, but never say never)
What do you guys think???