Parts fuel tank, how to test capacity before install?

Yes, because they look for Toyota logo on stamp of cat and nothign else to fail an inspection... And if they look back where gas tank is we've no idea what they'll be looking for but when talking about a 2004-09 Prius I'm near certain a gas tank assembly from a different model of Toyota will not pass that inspection. But would love to be proved wrong!

 

They'd have to have an idea that the gas tank is wrong? I'm gonna do my best to make it not so. Or look not so . Etc .

 

Nope, it's not just a pressure sensor. The later system uses a small pump to pull a slight vacuum on the tank "void" space and canister, and the ECM is looking for a pressure change consistent with that air volume.

It also vents the evap thru the purge solenoid and looks for another pressure change. Then checks for fuel leaks from the bladder.

Short form is the ECM is testing the entire SYSTEM, and the amount of jerry rigging needed to fool it would outweigh any gains from using the wrong fuel tank.

Posted via the PriusChat mobile app.

 

So with the pressure sensor inside yeti cup when the pump comes on to alter the pressure because the fuel is missing inside tank . So pump comes on to fill or sux the the space in tank the press in yeti cup changes too . The sensor do its job for such .. I'm not in California so if all this is going to put a light on because of some pressure not correct on a sensor . This will not affect my inspection in North Carolina or anything as old as car us I can burn or remove bulb. There's a push here now to remove emissions from the whole state and it's probably going to pass.