[bhogal]

just had a hks dump valve and hks decat pipe fitted to my car since i have had these mods done the cars been playing about, when im in traffic and im starting and stoppin in 1st gear sometimes the car revs drop really low like its going to cut out but then it revives itself and stays idle at 1 rev, pj motorsports said this could be caused by the new dump valve should i remove it and put the standard one back on or is there a way to fix it.

also ive had brakes discs and pads changed ive also had my wheels balanced but if im doing 80mph and brake sharpley i still get a wobbly/vibrating feeling in the steering any ideas cheers