| Drove the car for the first few times since the motor has been back in and after shut down I get something like this: Turn off car> sits for 5-10 min> low groan emits from rear of car for ~10 seconds.
-happens on low and full tanks of gas
-original: TT pump, check valve (under car), gas cap (poor seal?)
-All fuel system components engine bay side are new and mostly OEM.
-cleaned pump and tank: found nothing unusual. I noticed that when I remove the fuel cap, it depressurizes and stops the noise. Now whether the system is supposed to do this or not, I can be pretty sure that my situation is abnormally loud. Never noticed it on past Z's, or this one last time it ran. Thanks for any suggestions.
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