Having problem with boost fluctuation. Boost bounces between .12 and .06, but not all the time. Sometimes I can let it build slowly(roll on throttle) and it will hold at .1 until I shift. Sometimes it won't and starts to bounce. I cleaned the boost controller, and can hear it working(faint click when 12 volts applied). Cleaning changed nothing. The car used to boost fine till about 2 months ago, and had been getting slightly worse.
Car is a stock 2003 except for XS intercooler hoses, Prodrive axle back, and K&N drop in. I don't hear any boost leaks when its on boost. Seems like the boost controller can't cope with boost building too fast, over shoots, then can't catch up. Was going to replace the boost controller, but wanted to run it by you guys for any other ideas first. Would adjusting the waste gate arm fix this? Sorry for the long post, but any help is appreciated.