spluttering under load?

[KE70]

Car - KE70

motor - JDM 4age STD JDM ECU

problem - splutters under load but runs.

occurs/started when - always/since the conversion.
If I unlug the MAP sensor it revs fine just doesn't want to idle at all, stalls almost instantly.

personal situation - Started working on it again since the sun started coming out after the car was hibernating all winter, lol

Please help me and stop me buying a microtech cos I can get one brand new for cheap.

[biggo]

Do you have all your sensors hooked up?

Does it happen when cold/hot?

Tested MAP sensor?

Run diagnostics (if you wired it in) or use a scan tool?

Checked for fouled plugs?

[KE70]

It happens always and all sensors are wired in.

Diagnosics doesn't really work, maybe I should check the wiring for that.

I have tried with two MAP sensors and it does the same thing, also not aware on how to test it, I have no vac pump.

Plugs are fine, it used to do it since they were new and they have been cleaned and its still the same thing.

[biggo]

By testing the MAP sensor i just meant resistances. You have tried 2 so id assume thats not the problem.

Could be a a vac leak, dicky fuel pressure reg, semi blocked fuel filter, TPS incorrect setting.

Basically look for anything that alters air/fuel. Do you get black smoke (rich?)