MidwayAvenue

iTrader: (11)

Hey guys, I just bought a new trans am. I don't know much about the car no receipts and such but he gave me a mod list. It has a strong gassy smell coming through the vents when I turn the AC on. I understand that it will have a fuel smell out the exhuast due to the mods.. Any ideas?

TSP 233/239 112lsa camshaft
650" lift double valve springs
Chromoly pushrods
New Valve seals
LS6 Ported Oil Pump
Double roller timing chain
Monster Level 4 Clutch
PCV Catch Can
K&N Air filter
Pacesetter Long Tube Headers
Pacesetter ORY
Magnaflow catback
DMH 3" Electric Cut-out
MSD Plug wires and NGK TR55 spark plugs (both changed 500 miles ago)

Travu25

Mine does it too. No biggy

V68Sweep

I know someone with a similar problem, so I'm interested to hear what the reason may be.

jbridwelltransam

iTrader: (12)

mine does it after some hard driving. Wondering about it as well.

Hackscamaro

about the only way to get a fuel smell through the vents is the fuel pressure regulator but typically theres a hard start concern along with it. pop the vaccuum line of the regulator and see if its pulling fuel through there

kevin kuether

iTrader: (1)

It's probably an exhaust leak somewhere.

MidwayAvenue

iTrader: (11)

I don't have a hard start up but the idle is on the low side for a few seconds like it wants to turn off, but recovers quickly. Also it doesn't just do it after hard driving, smells from start up

MidwayAvenue

iTrader: (11)

bumpadoodledoo

cdubbzz

iTrader: (11)

Agreed, and the ORY is prob to blame....my car had minimal fuel smell with cats
but when I switched to ORY it increased big time

Sunset01TA

iTrader: (7)

Check pcv hoses.
Near back of engine.

Redbull87

iTrader: (3)

Check pcv at the rear,check hvac vacuum line and also check evap system.Usually this problem stems from one or combination of these and when you turn on the ac/vent..the air inlet for the vents is picking up the fumes(at the firewall) and blows it into the compartment.the filters for the hvac arent made for fumes..just there to try to keep dust coming in and blowing in your face.

wickedbluess

iTrader: (20)

I've read that this can be caused by the evap.