hey guys i own a 05 srt-4 and already i have a missing problem. I'm getting a code p1188 and i heard is a sensor tip or too much pressure in the intake manifold. For exhaust up grade i have an open downpipe. Which is a down pipe connect to the exhaust manifold and it extend down about a foot. I also have an agp adjustable wastegate with front mount intercooler. I boost up to 20pds. can anyone help me...?