Is it a emissions line?
Asked by Vince Sep 24, 2020 at 09:46 PM about the 2000 Pontiac Grand Prix GTP
Question type: Maintenance & Repair
I'm replacing the fuel pump on a 2000 Pontiac
grand prix GTP, while unclipping the middle fuel
line it snapped. Does anyone know what that was
for and how to get to it? I'm thinking I now how to
drop the tank completley..
2 Answers
It will need replacing, I don't know specifically if it is a vent line or fuel. So yes, you will need to drop the tank and see where it connects on the other end.
That is the vapor line going to the engine for the EVAP system. Note the letters on the other two connections. F=Fuel and R=Return. The fuel line is the gasoline supply line going to the engine. The return line is for excess gasoline returning from the fuel rail back to the tank. This is done to keep the fuel cool and prevent vapor lock. The EVAP line must be securely repaired with fuel vapor line. Regular rubber gas line will quickly deteriorate from the fuel vapors going through it. If you start having the service engine soon light come on with an EVAP code that's where the problem will be. The computer can detect an EVAP leak so small the naked eye can't always see it. So be sure to repair the line very well!! Hope that helps! Jim