Fuel Pump Question

[Sndsational]

Can anyone tell me of an easy way to diagnose an intermittent fuel pump problem? I have been have issue with lack of power, rough idle random misfire, etc. I did check my fuel pressure, but just to see if it went up to acceptable limit (and it did). Thing is I think it may lose pressure at times and cause issue. Also, I think I am the first to change the fuel filter and the truck has 102,+++ miles on it!

I also noticed that lately, it takes a little more to start in the morning and this AM it started and then immediately stalled....so???

I would like to diagnose this and see if in fact it is time for a new one....if so I am gonna do the tank and pump in one shot. Please help....

Oh, one more thing....what brand pump do you all recommend?

Thank you

 

[bluestream1]

Have you cleaned the IAC?

 

[ranger7ltr]

Can you test the fuel pressure as you drive?

That would give you a better idea when the pressure drops and whether the pump or a clogged filter is causing this...

When you changed the filter what did the fuel from the inlet side of the filter look like? If it was rusty/dirty/coffee colored, this crap is probably coming from the inside of the tank and will continue to clog up the filter...

 

[Sndsational]

The IAC is new, as are most of the parts on the vehicle at this point!!....the fuel from the filter was dark like coffee, but also I changed the filter again recently. One thing I did notice is that I have almost an empty tank right now and it actually seems to run better!?!?!? Any thoughts?

Also, if I wanted to test as I drove, how could I do that?

 

[ranger7ltr]

Attach a fuel pressure gauge...

And run the engine through the rpm range...If the gauge hose is long enough, I would attach it to the cowl and drive the vehicle in the way your performance come up...Since you have a 2000 Explorer, the fuel pressure should be 65-72 psi and be steady no matter what the load on the engine...

If the pressure drops, and you recently changed the fuel filter, you can PROBABLY rule out a clogged filter...But if the inlet fuel looked like coffee you are picking up this junk from inside the fuel tank...