Well, after working on those codes for about 6 months, mine ended up being a combination of crappy K&N filter, fouled maf (even after cleaning it 10+ times) and a bad oil pan gasket. I would try the MAF cleaning first with a real MAF cleaning product. In addition if you use a K&N, make sure it's not over oiled as I am sure that was what kept fouling my MAF. Let us know your results.

-glenn "Always workin to pay for the maintenance of my 'tour." 99 CSVT - Superchip, K&N Short Ram Intake, Pro Street 52" Blue Neons, Highs in Lows, Drilled/Slotted Rotors, Vortech SC is on the way...