2009 Nissan versa starts every time the key is turned but will not stay running no odb coads showing fuel pump pressure at 55 lbs.

SOURCE: hard start

Its your fuel pump.I had the same plomblem not too long ago.I was spraying either in to start it.I have a 97 chevy truck witch requires 65 psi to start and 55 to run properly.You need to find out much psi you need to start it.You can probaly look in your manual or just make a few calls.My truck had 55 psi and it ran fine i just had to get it running first.Good luck.I wonder if that fuel pressure regulator was a waste of time like it was for me.

SOURCE: 98 blazer stalls

It could be your fuel pressure regulator, check this link for details:

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528022b9c4

That's what it looks like.

SOURCE: olds alero 2.4 idle fuel pressure

most likely idle air control sensor or low engine coolant I know sounds funny but IAC uses coolant to regulate idle. Idle air control valve or throttle body positioning sensor.

Dave C

• 1050 Answers
• Posted on May 11, 2009

SOURCE: Buick Regal dying

You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.

Iron

• 3018 Answers
• Posted on Jul 29, 2011

SOURCE: 1999 Jeep Grand Cherokee, 4.0

• In a 1999 Jeep Grand Cherokee you don't have a pressure relief and rollover valve in the fuel pump. This is why you have noticed no real change when turning your Jeep off. The fuel pressure regulator is actually on the fuel line itself combined with the fuel filter.

• For this model of vehicle the fuel filter is combined with the fuel pressure regulator. Replace one to replace both.

1. Remove the fuel cap to release some pressure.
2. Disconnect the negative battery terminal.
3. Crawl under the vehicle.
4. Wear protective eye ware as some fuel will leak.
5. Now you will remove the fuel lines from the fuel filter.
6. Remove the two mounting bolts holding the fuel pump in place.
7. Remove old filter/regulator.
8. Install new filter/regulator and pay attention to the arrow on it. This MUST point towards the from of the vehicle.

• Hope this helps and thank you for using FixYa.