Very rough in reverse, smells rich sometimes
#1
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Year: 1999
Model: Cherokee
Engine: 4.0
Very rough in reverse, smells rich sometimes
Hey all.
For about a week now, when I put the XJ in reverse, it stutters. The power is there if I hit the throttle, but if I just put in reverse and no pedal, its very rough!
Today, while driving at about 45km/h the jeep died when I left off the throttle. Most posts Ive searched suggest the TPS. Could mine be bad while giving good readings?
I have recently done plugs, wires, cap, rotor, Camshaft position sensor and distributor. Seafoam, injector upgrade. All of this was about 5000 km ago, and ran fine.
In Neutral, or park, it runs fine for the most part, but sometimes goes rough and smells EXTREMELY RICH, like a bad 2 stroke!
I checked the TPS, read properly from 0.8VDC up to 4.62VDC smoothly. CEL is on, and I have the following.
P0138 02 Sensor circuit - High voltage
P0204 Injector circuit - cylinder 4
P0304 Cyl 4 misfire
P0705 Transmission range sensor malfunction
P1491 Powertrain.
For about a week now, when I put the XJ in reverse, it stutters. The power is there if I hit the throttle, but if I just put in reverse and no pedal, its very rough!
Today, while driving at about 45km/h the jeep died when I left off the throttle. Most posts Ive searched suggest the TPS. Could mine be bad while giving good readings?
I have recently done plugs, wires, cap, rotor, Camshaft position sensor and distributor. Seafoam, injector upgrade. All of this was about 5000 km ago, and ran fine.
In Neutral, or park, it runs fine for the most part, but sometimes goes rough and smells EXTREMELY RICH, like a bad 2 stroke!
I checked the TPS, read properly from 0.8VDC up to 4.62VDC smoothly. CEL is on, and I have the following.
P0138 02 Sensor circuit - High voltage
P0204 Injector circuit - cylinder 4
P0304 Cyl 4 misfire
P0705 Transmission range sensor malfunction
P1491 Powertrain.
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Carson_58 (05-07-2023)
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Year: 1998
Model: Cherokee
Engine: 4.0
Check the fuse for the O2 sensors in the fuse box under the hood, before you replace them. That code is for the rear sensor after the cat. it has nothing to do with the mixture so your gas smell is probably coming from the misfire on #4. It is very possible that the TPS is bad and still could test ok. Did you use a digital volt meter or analog? With the analog you can see the needle drop off during the sweep indicating one bad spot in the circuit. Also check that the IAC is working and not caked with carbon and other deposits. If the IAC is not able to move that would cause a stall and rough idle too.
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Year: 1999
Model: Cherokee
Engine: 4.0
OK so after a lot of looking, cleaning etc. I found the issue. The fuel rail is cutting into the wiring harness. I figured since I was getting multiple codes all of a sudden, it was weird!
I'll clean these up, and wrap it/pull it out of the way.
I suppose it was happening more in reverse because of the tilt of the motor causing a short.
I'll clean these up, and wrap it/pull it out of the way.
I suppose it was happening more in reverse because of the tilt of the motor causing a short.
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Carson_58 (05-07-2023)
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Year: 1999
Model: Cherokee
Engine: 4.0
I bought a parts jeep just lately, and the exact same spot is melting into his fuel Rail.
Obviously a common problem. Recommend everyone take a look there, and pin up that second loom if its not already!
Obviously a common problem. Recommend everyone take a look there, and pin up that second loom if its not already!
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