Fuel pump pressure bleeding off
Thread Starter
Burning Brakes
Joined: Sep 2013
Posts: 1,160
Likes: 171
Fuel pump pressure bleeding off
I put in a whole new ac delco pump assembly with a Walbro 450 (had an issue with the old filter housing not sealing on the pump and was loosing pressure). Now on the new one the pressure is good at idle, 61psi, but drops off immediately when the car is off. I dont see any leaks. When I blow into the line coming off the top of the pump I cant hear any leaks with the pump removed from the tank. Im gonna pull the pump out of the tank again. Am I missing something here? Racetronix stated the pump does have a check valve.
Id like to mention that with the old pump, it did hold pressure very well with the key off. It still would have 40psi when left overnight. The problem with the filter housing began about 2 weeks after the 450 install.
Id like to mention that with the old pump, it did hold pressure very well with the key off. It still would have 40psi when left overnight. The problem with the filter housing began about 2 weeks after the 450 install.
Thread Starter
Burning Brakes
Joined: Sep 2013
Posts: 1,160
Likes: 171
How does the passenger side siphon pump hold pressure? Check valve?
I took the driver side pump assembly back out and its solid. If I blow into the line coming off the top of the pump assembly there arent any leaks.
I took the driver side pump assembly back out and its solid. If I blow into the line coming off the top of the pump assembly there arent any leaks.
