runs rough above 10 psi

[SHEARER_TSI]

Ok so we got this damn thing going again tonight and here is how it goes/went. Take the car out and it runs good at 10 psi, turn up the boost to say 13-15 and it falls on it's face and starts to miss. It acts like it's loading up/missing even at idle. If you shut it off and let it cool down it will run fine until you hit boost again. It has a 16g, stock injectors, walbro 255, boost controller, 3' exhaust.

 

[curt-s]

Have the stock injectors been professionally tested to ensure they work properly at higher rpm and are flowing properly? Have you checked your O2 readings? Stock injectors are usually tired, and if it's a 1990, they're a quarter century old.

 

[SHEARER_TSI]

No they have not been. The car is actually a 91 but yeah same thing . Going to try some 550's today I think

 

[SHEARER_TSI]

https://www.youtube.com/watch?v=mPgsCqp8s_A&feature=youtube_gdata_player