dont bother, just light s cigarete and wave it around under it and look for the smoke to blow around near a leak.
if it was a leak the pcm would be reading it as lean, and it would be + 20 LTFT comanded
im going to guess the PCM was tuned and the car demodded.
flip the PCM over and see if the large paper OEM labels are still there (size of 2 packs of smokes, 100's next to each other) or if its just a small (probably blank by now) zzp/intense label (buisness card sized)
even if its still the factory tag, it may be tuned just not a store bought canned tune.
