So this weekend I picked up a nice mk3 turbo, car is really clean and runs great. Has intercooler, icp, bov, full 3" turbo back straight pipe, boost controller and other nick jacks. I need to weld the bung for the arm wideband. Car is running 6psi on low boost setting and 11psi on high. I took my bro for a ride and did a 2nd gear pull it missfired, and the electronic boost controller screen lit up red, did the same thing in 3rd. Now it's having trouble idling, runs and drives, seems like its stuttering a little but when I push clutch in it will either die right away, o run for a couple seconds then dies off. It doesn't like missfire off, it just insta-dies . Tomorrow I'm planning to scan it for codes, weld the bung and hook up wideband, put new plugs in( and what kind of plugs should i run, what gapping also?) , and run fuel injector cleaner, and time it. Any help would be great