Where should i start, i read that it could be gas cap, bad fuel, vacuum leak any ideas will help, thanks

2006 lacrosse 46k miles

P0496, evaporative emission system high flow purge.

Not a lot of information on this. But from what I can see it sounds like the purge valve may be bad.

where is it located on the 3800 , can it be cleaned, thanks

It'* right behind the throttle body on the upper intake manifold. Generally no, it'* a valve that opens and closes. If it'* stuck you will get a high flow error.

cool i found it on rockauto is it the valve or solenoid? is installation just plug and play type?

thanks again for your help, also before the SES light at idel the car jumps rmp only by 100 rpm hardly noticable is that because of the valve too or i have a small vacuum leak



2006 BUICK LACROSSE CX 3.8L 231cid V6 FI (2) OHV
Emission : Vapor Canister Purge Valve
ACDELCO Part # 2142125 **#12592015, 12608378, 2141473}
VALVE,Evaporative Emission Canister PURGE SOL
$16.96 $0.00 $16.96
Emission : Vapor Canister Purge Solenoid
ACDELCO Part # 2142147 **#15208329, 215628, 25932569} replaces 215-628
VALVE,Evaporative Emission Canister VENT SOL 4 DOORS; ROUND VALVE
$20.79

Should be just remove it, and install new one. If the valve is stuck open then ya, it'* basically a vacuum leak.

so its the Emission : Vapor Canister Purge Valve
ACDELCO Part # 2142125 **#12592015, 12608378, 2141473}
VALVE,Evaporative Emission Canister PURGE SOL
$16.96


so i can order it now

I can't say for certain, I'm not looking at your car. But from what information you have given me and what I can tell, the purge valve solenoid is the problem, stuck open. The part you have listed appears to be the correct part. EVAP codes can be a real pain, but your code seems to point to that part.

Thank you for your help, i will go ahead and order it then, thanks

Post up if it corrects the problem.