Hey everybody!

I need some help! My 2007 Supra with the Cat340 engine is at the dealer for a check engine light. The fuel rail is pushing a 100psi, and they can not figure out what is wrong. At this point, the dealer is throwing parts at it and the bill keeps increasing. So far we have replaced the fuel pressure regulator and the fuel return line to the tank, but this has not fixed it. He is now wanting to replace fuel pumps (my boat has 2 due to a vapor lock issue), which will cost around $900. Has anyone else seen this issue or have any ideas on what is needed to fix this problem?

I have asked the dealer to check to make sure we did not get a bad fuel pressure regulator and to bypass one of the fuel pumps to see if this fixes this issue. The engine keeps throwing a check engine light for the oxygen sensors (which we initially replaced). Any help or ideas would be greatly appreciated!

Rodger