Jeep Wagoneer Running VERY Rich

Hi,
I have an 87 Jeep Wagoneer with the 4.0. It seems to be running very
very rich at the moment amd I have no clue why either. It's actually
running so rich that I am getting about 4 miles to the gallon. Now, you
all need to understand that this is an offroad beater, so it's been
ridden hard, and has a few vacuum lines missing, etc... I'm not sure if
this is the problem though... Any ideas?

Start with trying to burn the gas you're giving it, by replacing
the spark plugs, ignition wires, cap and rotor.
God Bless America, ßill O|||||||O
http://www.billhughes.com/

wrote:
>
> Hi,
> I have an 87 Jeep Wagoneer with the 4.0. It seems to be running very
> very rich at the moment amd I have no clue why either. It's actually
> running so rich that I am getting about 4 miles to the gallon. Now, you
> all need to understand that this is an offroad beater, so it's been
> ridden hard, and has a few vacuum lines missing, etc... I'm not sure if
> this is the problem though... Any ideas?

Thanks for the advice. I've already tried all that though. =-( It gets
weirder though... The Jeep stumbles and misses below 2,500 RPM, then
i'll rev it and it will miss and stumble, but as soon as it hits 2,500
and thereafter, it runs beautiful, has all its power, and seems normal.
I just don't get it?

> wrote in message =
oups.com...
> Thanks for the advice. I've already tried all that though. =3D-( It =
gets
> weirder though... The Jeep stumbles and misses below 2,500 RPM, then
> i'll rev it and it will miss and stumble, but as soon as it hits 2,500
> and thereafter, it runs beautiful, has all its power, and seems =
normal.
> I just don't get it?
>=20

Look for a leaking needle-and-seat... raw gas is
probably dumping into the carb. You can test
this by clamping the fuel line closed and noticing
an improved idle... clamp the rubber portion!
__
Steve
..

those missing vacuum lines could definately be an issue, but follow stephen's
advice first, then replace all vacuum lines accordingly, or make sure
everything is plugged........then off to the next step

Stephen Cowell wrote:
>> Thanks for the advice. I've already tried all that though. =-( It gets
>> weirder though... The Jeep stumbles and misses below 2,500 RPM, then
>> i'll rev it and it will miss and stumble, but as soon as it hits 2,500
>> and thereafter, it runs beautiful, has all its power, and seems normal.
>> I just don't get it?
>
>Look for a leaking needle-and-seat... raw gas is
>probably dumping into the carb. You can test
>this by clamping the fuel line closed and noticing
>an improved idle... clamp the rubber portion!
>__
>Steve
>.


--
Message posted via http://www.carkb.com

Well this is EFI, so there is no carberator...

what kind of carb do you have?


Robb S wrote:
>those missing vacuum lines could definately be an issue, but follow stephen's
>advice first, then replace all vacuum lines accordingly, or make sure
>everything is plugged........then off to the next step
>
>>> Thanks for the advice. I've already tried all that though. =-( It gets
>>> weirder though... The Jeep stumbles and misses below 2,500 RPM, then
>[quoted text clipped - 9 lines]
>>Steve
>>.


--
Message posted via http://www.carkb.com

Maybe you have a stuck open fuel injector. It could cause your
symptoms. I would be pulling the plugs to see which cylinder was
burning wrong.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

wrote:
>
> Hi,
> I have an 87 Jeep Wagoneer with the 4.0. It seems to be running very
> very rich at the moment amd I have no clue why either. It's actually
> running so rich that I am getting about 4 miles to the gallon. Now, you
> all need to understand that this is an offroad beater, so it's been
> ridden hard, and has a few vacuum lines missing, etc... I'm not sure if
> this is the problem though... Any ideas?

I was wondering if maybe the 02 sensor was bad, telling the computer to
give more gas? I will also check the plugs. Thanks

02 sensor bad or wiring bad
MAP bad or vacuum leaking
CTS bad
TPS bad

get the Renix system checked with a scanner/tester so you can see what the
ECM sees.