1990 Mercury Grand Marquis Q&A

1990 Mercury Grand Marquis Question: will a faulty fuel pump vapor lock a gas line

when it gets hot it dies -
Answer 1
vapor lock happens when the fuel boils and creates air in the system. with the new cars, increases fuel pressure stops that process. it sounds like you have a fuel pump failing when it gets hot. have a pro diag it for you to confirm Roy -