hey guys, 95 gc8, just put inb a robs 440 tune.. i tried installing an mbc, but turn out it was buggered.. so im still using the stock bcs. it was running fine for about a week, full boost all the time (16 psi) and now these past couple days it will boost to 16 in 3rd and 4th, but soon as i get into 5th gear ill get to about 10 psi then i get a boost cut, then 7psi MAX in every gear, untill i shut the car off and restert it. then same thing all over in 5th.
i noticed my knock sensor goes off in the higher rpms, and also it goes on when i get that boost cut.
i havent had time to do a proper ecu reset, but i dont have any cels on right now.
is this a buggered bcs? any help to point me in the right direction would be great. thanks!
oh one more thing, i did fill up at a petrothis tank instead of shell that i always go to.. 91 octane. dont know if that could be a factor