passenger side hissing.

[bpb424]

I recently installed some custom tunes from innovative (xtreme street), and I didn't notice much smoke at all. I took a long trip this weekend, (400 miles not towing anything) and now it seems to smoke black like a beast. I also noticed a hissing noise from the passenger side under the hood when the motor is off.

I thought the hissing maybe coming from the AC condenser?
not sure about the black smoke, worried the up-pipe might have gotten cracked.

Thanks

[2000 7.3 6speed]

Does there seem to be any differnce in power?

[EssentialJuice]

well the exhaust wont hiss if the motor is off, so you can rule that out. probably is a/c.
cant help you with the black smoke thing...sorry.

[bpb424]

I'm not a complete idiot, lol. I just didn't know if there was something that stored pressure while the engine was off.

the power seems to be the same to me... Maybe I shouldn't worry about it, I'm just always paranoid something is goin on with this thing. I need do a sig, its a 2006 f350 srw

[03f250stroke]

you got any soot around the firewall?

[psd_va]

my truck dose the same thing its coming from the evaporator or the acumlator