These were previously installed and i have no idea what size they are. I cant see the numbers on the side unless i take them out. Well i dont want to remove them so i thought i would ask here. I can make out the last few numbers and it says xxxxx-0850 and denso. So are they denso 850cc?

Ill upload a pic shortly.. They are black housing with blue connector and mid section fyi

 

Check your ecu roms injector scaling. You'll need ecuflash and a tactrix cable.

 

To truly know, you would have to get them flow rated/cleaned.

But yeah, good starting point is ECU flash and look.

 

Good ideas! I forgot about checking the ecu. I did find some pics and i think the numbers are 0830 and they are 720cc