JDM fuel pump/ funny idle on 20v

[sdrawkcab]

The OEM fuel pump on a JDM EFI hachi should be enough for a bt 20v right? I have me blacktop in and running but it idles really poorly. I looked at the data on the laptop and it looks to lean out then go back to a good fuel mix. Is this the fuel pump not keeping up? It runs at all other rpm fine so I would suspect it still get enough fuel. It hasn't been tuned yet just the microleb base tuning, so maybe its just that? It goes in for a dyno next wed so if this is a problem that is mechanical I'd rather fix it before I get it to them. Any ideas guys?

[anastasios]

I wouldnt think it would be enough for a 20v OEM is designed for a bluetop

[Futo_gt86]

Could be the vacuum signal to the microtech MAP. May need some fine tuning on the idle map. Probably best left for tuner.

[Skylar]

It's fine dude, the fuel pump isn't the prob.

Are you running some sort of idle control? If not it might have a hard time keeping a steady idle, which you can band-aid up by tuning or raising the idle. Since it's only a base tune, the idle area needs tuning (along with the rest of the maps) like Futo said.

[sdrawkcab]

I have plugged up the iscv on the intake manifold so I'm probably just relying on the microlebs ability to control idle. Reckon I should re connect the iscv?

[Skylar]

How much do you care about idle quality?

I got my sr to idle within like 100rpm off what was set off the idle screw with just tuning and that's just going off feel, no O2 sensor at the time. Then I switched idle control on and the thing would just hold rock solid idle, it went maybe 30rpm up or down off target idle rpm.

Then again with the big port, I ran stock ecu with no idle control and left the idle at 1300 hot/800 cold and never worried about it.

[sdrawkcab]

I want the idle to be nice not what it is now. ATM it sits fine at a decent rpm then leans out and almost stalls. It gets so low in rpm it shudders the whole car.