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05-16-2013, 08:53 PM
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Year: 1990
Model: Cherokee
Engine: I6 4.0
^^^ I'll try again tomorrow. Hope it actually works. Matches my interior and its the first old body style one I've seen in person.
05-16-2013, 08:54 PM
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Year: 1992 Cherokee Sport
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05-17-2013, 08:03 AM
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Year: 1996
Model: Cherokee
Engine: 4.0
Im using the Torque app. It shows my upstream O2 is going from .7ish volts to .1ish and back again. It goes up and down like that alot. Bad sensor? The downstream seems to stay around .8ish iirc.
05-17-2013, 08:34 AM
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
An O2 sensor that is switching is functioning. One that is not, is not functioning.
05-17-2013, 08:59 AM
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Year: 1996
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05-17-2013, 09:18 AM
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Uhhhh well your downstream O2 is definitely not working. It sounds like you have a lot of work to do (fixing your MAP probably included)
05-17-2013, 09:21 AM
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Year: 1996
Model: Cherokee
Engine: 4.0
Edit: ill post a couple screenshots of the sensor activity in a bit whe i get home just to clarify and show what theyre doing.
Last edited by Eagle564; 05-17-2013 at 10:56 AM.
05-17-2013, 11:16 AM
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Year: 1996
Model: Cherokee
Engine: 4.0
The first pic shows the 2 sensors voltage while at idle and operating Temp while parked.
The second pic is after I revved to about 1500 rpms for a couple of seconds.
The third pic is under normal driving conditions around 30mph
My intake manifold pressure was around 37-40 kPa at idle and my MAF rate wasn't showing up. Idk if thats the app malfunctioning or the sensor.
The second pic is after I revved to about 1500 rpms for a couple of seconds.
The third pic is under normal driving conditions around 30mph
My intake manifold pressure was around 37-40 kPa at idle and my MAF rate wasn't showing up. Idk if thats the app malfunctioning or the sensor.
Last edited by Eagle564; 05-17-2013 at 11:42 AM.
05-17-2013, 01:59 PM
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Not sure on what the switching rate should be exactly. Basically the sensors bounce between "Rich" and "Lean". In OBD2 Jeeps, the downstream O2 sensor is used in calculating the fuel trim in closed loop modes.
The MAP is dependent on getting good vacuum from the intake manifold. I think in 1996 they still put it on the firewall. The little hose from it to the manifold is brittle and a common failure, resulting in a ton of fuel being used.
The MAP is dependent on getting good vacuum from the intake manifold. I think in 1996 they still put it on the firewall. The little hose from it to the manifold is brittle and a common failure, resulting in a ton of fuel being used.
05-17-2013, 02:08 PM
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
Not sure on what the switching rate should be exactly. Basically the sensors bounce between "Rich" and "Lean". In OBD2 Jeeps, the downstream O2 sensor is used in calculating the fuel trim in closed loop modes.
The MAP is dependent on getting good vacuum from the intake manifold. I think in 1996 they still put it on the firewall. The little hose from it to the manifold is brittle and a common failure, resulting in a ton of fuel being used.
The MAP is dependent on getting good vacuum from the intake manifold. I think in 1996 they still put it on the firewall. The little hose from it to the manifold is brittle and a common failure, resulting in a ton of fuel being used.
05-17-2013, 02:16 PM
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
05-17-2013, 02:35 PM
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Year: 1998
Engine: 4.0
I got a bunch 0f 3/16 plate sitting around and i want to build a new front winch bumper
Question is can i build the whole thing out of 3/16 or will i need thicker steal for the mounts to the unibody?
Ive always used 3/8 for the frame mount but i here some guys are using 3/16 or 1/4 plate
Whats your opinions ?
Question is can i build the whole thing out of 3/16 or will i need thicker steal for the mounts to the unibody?
Ive always used 3/8 for the frame mount but i here some guys are using 3/16 or 1/4 plate
Whats your opinions ?
Last edited by XJ=mistress; 05-17-2013 at 02:40 PM.
05-17-2013, 03:11 PM
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Year: 1993 YJ Wrangler
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