Hesitation at high RPM's

[tommy583]

Well on the ride home from work the car ran great. It's around six miles to the hi way on ramp. So the car was nice and warmed up before i got to it. I took her to 5 grand in first, 5,500 in 2nd and 6 grand in 3rd. No hesitation. 65 deg outside temp. Got on it in 1st and 2nd when i got off of the hi way. Still good. With a cooler outside temp i would think that it's not a fuel pressure issue. Cooler air is more dense, so i would need more fuel to have a good burn? I'm going to clean the MAF to see if that helps. I'd rather try that for the cost of the spray before I pay to get the codes read. Good idea? Maybe there is some oil in the intake from when my AOS failed?