ok, i just got done putting together my lsv rebuilt b18b w/ a gsr head
i changed the intake manifold to a blox one and throttle body to a turner 68mm
i connected everything and when i start it with my p75 it idle fine but when
i rev it up or drive it around the block the car would stall out on its own...
i checked the timing and it was fine its at TDC..and when i put in my other p28 the car would turn over but will not hold idle.. im thinking maybe getting a stock p72 ecu? Can anyone help me out pleaseee..! thanks.

 

did you calibrate the tps

 

also do you have a wideband to see your air/fuel ratios, sounds like it needs to be tuned

 

At least get the right ecu.

 

Calibrate your tps, and get a tuned ecu for your ls/v. Another thing you need to look in to is adjustable cam gears, an ls/v will always be slightly off in timing. Take it to a dyno and get it timed and tuned and you should be fine.

 

^^^ agreed

what pistons are you using? stock ls? and what cams? sounds like a TPS calibration issue to me also get your p28 socketed and tuned.

 

There's two plug behind the intake manifold that will plug into the same socket, and if the wrong plug is in that socket it will cause your idle problem . Find those two plug and switch them around, and that should fix your priblem.

Why, cause that happened to me