Live Data from Scanner Vacuum leak?

Hi guys,

I just bought an actron scanner with live data capabilities, I decided to hook it to my windstar after a small trip and according to what I've read and the results I think I'll be chasing a vacuum leak. The van will run rough sometimes specially during hot days.

This is the data I gathered from the scanner:

NOTE: Scanner is adjusted for metric units.

ABS TPS 17.6
RPM 712
LOAD 16.5
MAF 3-3.5
ECT 89
IAT 57
IGN ADV 20-22
STFT1 -2.3 **This one would also go up to 3.4 at some point
LTFT1 14.8
STFT2 1.6-0.8
LTFT2 10.2
02S11 0.635
O2S12 0.770
O2S21 0.170, 0.5, 0.3 This would fluctuate between these 3 numbers
O2S22 0.895
OBD2 STAT CA
STFT11 % -4.3
STFT21 % -3.9
FUEL SYSTEM 1 CL

There are no DTC's and all readings were taken at idle, the LTFT would go down when revving the engine. It's possitive value and the dropping at high RPM's are making me think of a vacuum leak.

Thanks in advance for any thoughts about the values.

Oscar.