Is200 stalls/dies at high rpm

[Keithok]

Hi lads I'm having issues with my is200, I recently tried supercharging it but I came across this issue, I took off everything got to do with the supercharger kit and still having the exact issue even though now the car is back to stock/NA

the issue is that when I rev the car past 5k rpm the car just dies when ya let off the throttle

i tried the tb mod but idled like **** so bought another tb to replace the old one, I had to make a new tb gasket out of gasket paper because the metal one broke, I had the injectors out but put them back in

[ColinBarber]

As the ACIS valve is meant to open at high rpm I'd check that operating correctly and there isn't a vacuum leak when it tries to open at high rpm which then causes a problem as it goes back to idle.

Just temporarily clamp both the hoses or disconnect the wiring (which will generate an engine check light) to see if it makes a difference.

 

You can see it in this video - although I don't really recommend deleting it as suggested here for anything other than a test to help diagnose your issue as it can be detrimental to low end torque if it isn't working correctly.

 

 

[Keithok]

@ColinBarberthanks for the help! Will do that and see if it fixes the issue