Bank 1&2 Lean

[sport01]

I have Engine Check light on all the time. I got it checked at Autozone and they found Bank 1&2 lean. I have cleaned MAF, checked the obvious hose connections, out premium gas, added Fuel Injector cleaner in the fuel. Nothing changed. This one has 126K miles and I bought it few months ago. The light started coming on about three weeks ago. I have not done any work on this so far. The engine runs good. I am getting little over 12 mpg driving in town . This is 2001 Sport ,4.0l, six cylinder,4WD. Any help?

 

[drdoom]

Is that a V6?

 

[sport01]

Yes. is 4.0L, six

 

[Turdle]

Replacing the intake manifold gaskets will probably fix this. Pay attention to the vacuum hoses as you dig in,looking for cracks and tears. Also, it will help to take a lot of pictures. This way it should go back together pretty quickly for you.

 

[drdoom]

http://www.explorerforum.com/forums/showthread.php?t=171819

 

[herebyproxy]

Replacing the IAC valve fixed it for me

There are several threads on the IAC valve

 

[SparkyGT]

i did all the tests as per stickies also, eventually had to changed out the gaskets, i was getting some funny rpms also when it was cold, of course this didnt happen when it was warm up here, so had to take it in to Ford dealer

 

[chapsdeva]

Definitely intake gaskets..very common problem