96_LAstang

I my car is running lean in bank 1 & 2 and i bumped up my WOT air/fuel as far as the SCT would let me(14%). My fuel pump doesn't ever cut off( if thats means anything), I was going to change my fuel filter but i really have no idea what to do.Any other things i should check?

monkeydude3

the fuel filter swap is not a bad idea. I'd suggest you check your fuel pressure and see where you are at.

How many miles on the clock?

96_LAstang

138K

monkeydude3

have you ever changed the filter before?

Before you really do anything I'd try to check your pressure. So you know... Ford's fuel pumps are not the greatest for longevity, at least from what I have seen.

You have any sort of exhaust leak before the 02s? That could throw it off too...

I'm just throwin stuff out there

96_LAstang

I've only had the car about a month, And as fas as i know no exhaust leak but i turned my O2 sensors off with the SCT because i have an O/R X pipe

monkeydude3

okay, you turned off the rear 02s, and the front 02s are still on and always should/will be.

I'd check your fuel pressure, if it's iffy, swap the filter, if it gets better great, if not, you may need a pump.

I'd just have a LOOK at your filter and see if it looks really old or not.

what you can do is when the engine is COLD pull a plug or two and see if they really look like they are lean or not...

96_LAstang

the filter looks pretty new, but i'll pull a few plugs out tomorrow and see.

monkeydude3

well just have a look... lean is usually white color... if it looks grey you are probably fine.

I wonder if you have bad luck and have two bad 02s... it has happened before...

did you buy the car with this stuff done to it? With it running lean? And I presume there is a check engine light on?

Just tryin to help you go the steps

LetThePoniesRunFree

When you say your "fuel pump never cuts off", are you saying before start up but after you turn the key to run position, the fuel pump never shuts off at all?

96_LAstang

Yea after istart it still stays on