fuel filter stupid question

[cbxer55]

Don't know about anyone else, but mine, the fuel pressure drops to zero PDQ after I shut it off. Was that way with the original fuel pump, and been that way since I put a new one on in 2017.

 

[Curious Hound]

Don't know about anyone else, but mine, the fuel pressure drops to zero PDQ after I shut it off. Was that way with the original fuel pump, and been that way since I put a new one on in 2017.

There should be a check valve in the system to maintain pressure when the engine is off.

 

[cbxer55]

There should be a check valve in the system to maintain pressure when the engine is off.

Is that somewhere near the fuel pressure regulator? When the truck is running, fuel pressure is in spec. And it starts right up, first turn of the key. Don't even need to turn it on and off multiple times to get it going. 207,000 miles.

 

[Curious Hound]

I thought it is often part of the fuel pump assembly in the tank.

 

[lil_Blue_Ford]

I thought it is often part of the fuel pump assembly in the tank.

The “returnless” systems had it on the fuel pump assembly. The older return style systems had the regulator on the rail. Technically the ones in the tank can be replaced but often get ignored until the pump fails.

 

[cbxer55]

Maybe so. But that would mean the new pump I put in it in 2017 was bad right off. Like I said, hasn't caused any issues. Start good, runs good.

 

[Curious Hound]

Maybe so. But that would mean the new pump I put in it in 2017 was bad right off. Like I said, hasn't caused any issues. Start good, runs good.

If it works, drive it.

 

[cbxer55]

If it works, drive it.

I do. It's my daily driver "beater", so my 2004 Lightning can relax in the garage. 207,000 miles on the Ranger, 77,000 on the Lightning.