HELP: I just got my new (to me) 2000 LS400 and she doesn't want to take gas. I have to pump it unbelievably slow or it starts backing up the neck. I've been told it could be that a fuel vent is blocked. Any thoughts..... and where do I check to see if it's blocked ???

Thanks.

 

i believe this to be a common problem and is covered by lexus...

 

first i would INSPECT FUEL CUTOFF VALVE AND FILL CHECK VALVE
download from
http://www.2shared.com/fadmin/498810.../FUEL_TANK.zip
Or
Download

check this attached file for location of FILL CHECK
VALVE
LS400_EVAP.zip

 

Does anyone know how to check either of these valves and do I access them through the trunk ? Thanks