I recently did some work to my 05 LGT - It has basically been upgraded to an STI level stage 2 most of the mods were installed when I purchased the car and I'm reworking many of them as they were done in a shotty fashion to be nice about it...
-K&N cold air intake
-Perrin exhaust manifold
-STI intake manifold
-Top Mount STI intercooler
-Subaru indash tri-gauge pod
-Air/fuel ratio gauge (not sure of the brand, works well though)
-HID headlight conversion
-Open source tune ith a VF40 stock turbo(modest tune but still upwards of 300hp still fun!
Here's the problem, I recently replaced the passenger side valve cover gasket, in the process i removed the cold-air intake pipe and decided to clean the MAF (w/ carb/brake cleaner which I now know is a bad thing to use) because the car has had some strange cold winter start idle issues lately so I figured it was worth a shot, oops.
Anyhow- I replaced the valve cover gasket, switched from standard oil to synthetic, peeked at the timeing belt, refilled the coolant and got everything back together no problem.
HERE'S THE PROBELM - When I started the car today 12 hrs after the repairs it was running very rich... basically when I would give any throttle the fuel/air meter would slam into the "rich" zone and the engine would sputter.
I shut the car off and when I restarted it it ran/idled just fine like it should, but I couldnt get any more than 5 lbs of boost witout it ging into the sputtering/flooding mode.
Could a MAF sensor be causing this problem?