paul

I have a 1996 f 150 with a 4.9L The check engine light is on. "system to
lean bank one and bank two"

I have already cleaned the injectors, changed the plugs and ran cleaner
through the gas tank. I changed over from conventional oil to mobil one.

Any ideas???

TranSurgeon

plugged fuel filter or low pressure from fuel pump, mebbe ?

is there a test fitting on the fuel rail ?


"paul" <paulreiny@earthlink.net> wrote in message
news:Yh6pe.390$VK4.113@newsread1.news.atl.earthlink.net...
> I have a 1996 f 150 with a 4.9L The check engine light is on. "system
to
> lean bank one and bank two"
>
> I have already cleaned the injectors, changed the plugs and ran cleaner
> through the gas tank. I changed over from conventional oil to mobil one.
>
> Any ideas???
>
>

coryrhonda

check the gasket between the upper and lower intake manifolds for a leak.
That gasket has a slight higher than average failure rate when older. Spay
bottle with course mist of water (safer) or carb spay will dramatically
change the idle when sucked in a leak. if not leaking check for any other
leaks.
Watch the carb spray around the distributor exspecially

David M

On Tue, 07 Jun 2005 00:57:28 +0000, paul rearranged some electrons to
form:

> I have a 1996 f 150 with a 4.9L The check engine light is on. "system to
> lean bank one and bank two"
>
> I have already cleaned the injectors, changed the plugs and ran cleaner
> through the gas tank. I changed over from conventional oil to mobil one.
>
> Any ideas???

Vacuum leak, maybe?

--
David M (dmacchiarolo)
http://home.triad.rr.com/redsled
T/S 53
sled351 Linux 2.4.18-14 has been up 13 days 3:04

BCM

Sounds like you need a new fuel pump. I just went through the same problem.
Cause was the fuel pump and one of the 02's



"paul" <paulreiny@earthlink.net> wrote in message
news:Yh6pe.390$VK4.113@newsread1.news.atl.earthlink.net...
> I have a 1996 f 150 with a 4.9L The check engine light is on. "system
> to lean bank one and bank two"
>
> I have already cleaned the injectors, changed the plugs and ran cleaner
> through the gas tank. I changed over from conventional oil to mobil one.
>
> Any ideas???
>