AlphaWhiskey
NAXJA Forum User
- Location
- SE PA
I have a 1996 Jeep XJ Classic 4.0 Auto.
I am at my wits end with this thing. So ever since I first bought it 2 years ago its had bad fuel mileage. As in at best 150 miles per tank average is about 120.More recently I have had and intermittent Rich smell and Low power followed by a CEL for the Downstream O2 sensor heater. It also takes forever to warm up and usually wets the ground with fuel under the exhaust.
Things I have Replaced/tested
upstream O2
downstream O2
MAP sensor
Coolant sensor.
IAT sensor
TPS sensor
Tune up (Cap,rotor,plugs Fuel filter) This actually made the mileage worse.
I do have a small crack on the exhaust manifold, I am unsure if this is enough to make this much of an impact.
Anyone have any ideas.
If need be I can post Graphs of the o2 output.
I am at my wits end with this thing. So ever since I first bought it 2 years ago its had bad fuel mileage. As in at best 150 miles per tank average is about 120.More recently I have had and intermittent Rich smell and Low power followed by a CEL for the Downstream O2 sensor heater. It also takes forever to warm up and usually wets the ground with fuel under the exhaust.
Things I have Replaced/tested
upstream O2
downstream O2
MAP sensor
Coolant sensor.
IAT sensor
TPS sensor
Tune up (Cap,rotor,plugs Fuel filter) This actually made the mileage worse.
I do have a small crack on the exhaust manifold, I am unsure if this is enough to make this much of an impact.
Anyone have any ideas.
If need be I can post Graphs of the o2 output.