Delphi Fuel Injection Pressure Regulator - FP10300

2003 Chevy Impala. Exact fit, including the top stem which is important for the vacuum system. Delphi makes generally reliable parts. Replaced original which was leaking; this is working well. Pain to install - have to take off the air intake system to get at the screw and fuel line bolt. Install outdoors. Gas will leak from fuel line even after depressurizing the fuel line. Youtube vids show how, but they also claim it can be installed without air system removal. Not this car this time. Excellent price, fast delivery, exact part. Also change the fuel filter when you do this repair because you will depressurize the fuel line. Careful on restart as there will be air in the fuel line. Let your mechanic do it because of the fuel splash.

I replace it on my 3.4 gm hoping it fit the problem with fuel pressure . it work perfect . but my fuel pump one way valve is not holding the pressure and the pump is not charging 58 to 60 how is supposed to work. Now is 48My problem was fuel pressure goes down to10 psi in 5 min with engine offI know is bad . now it still on 40 psi 30 min later . much better but no enoughThe symptoms is IN COOL ENGINE IT FIREUP PERFECT ( ONE SHOT) WHEN IS HOT EMGINE IT FIRE UP AT SECOND TIME OR 3EVEN IF YOU LET PUMP PRIME . NOT WORKHOPE IT HELPS YOU

Excellent fuel pressure regulator and fit exactly like OEM!

Fixed problem with hard starting on 01 cavalier, some skill needed to replace,need to remove parts to get to it, if you remove vac line from this part and have gas come outit's bad, needs replacing, causes car to lose fuel pressure when not running,then won't start good.

Seems like really good quality. Has worked for a few weeks now.

Good quality and solved a fuel seepage problem.

It works great. And a lot cheaper than the oem part

If fit and worked perfectly . I had a cheap one on there. You can feel a better ride