92 Jeep XJ 4.0 Flooding Randomly during startup and driving
05-02-2014, 12:18 AM
#1
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Year: 1992
Model: Cherokee
Engine: 4.0
92 Jeep XJ 4.0 Flooding Randomly during startup and driving
Hi Everyone,
I Have a 92 Jeep Cherokee 4.0 245,000 only 70,000 on a new engine. I'm having random flooding causing large amounts of black smoke on startup and stalling when driving I have had this problem before and replaced the TPS and I went away about a year later it's back and just replace the TPS under warranty and I didn't fix it so I need some help I am very mechanically inclined. I have checked all sensors and reset the computer and checked all the spark plugs and gap. Don't know if related but I replaced the motor mounts with brown dog urethanes and also the dizzy due to the old one having a failed seal. So Fire Away
I Have a 92 Jeep Cherokee 4.0 245,000 only 70,000 on a new engine. I'm having random flooding causing large amounts of black smoke on startup and stalling when driving I have had this problem before and replaced the TPS and I went away about a year later it's back and just replace the TPS under warranty and I didn't fix it so I need some help I am very mechanically inclined. I have checked all sensors and reset the computer and checked all the spark plugs and gap. Don't know if related but I replaced the motor mounts with brown dog urethanes and also the dizzy due to the old one having a failed seal. So Fire Away
05-02-2014, 08:27 PM
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Hi Everyone,
I Have a 92 Jeep Cherokee 4.0 245,000 only 70,000 on a new engine. I'm having random flooding causing large amounts of black smoke on startup and stalling when driving I have had this problem before and replaced the TPS and I went away about a year later it's back and just replace the TPS under warranty and I didn't fix it so I need some help I am very mechanically inclined. I have checked all sensors and reset the computer and checked all the spark plugs and gap. Don't know if related but I replaced the motor mounts with brown dog urethanes and also the dizzy due to the old one having a failed seal. So Fire Away
I Have a 92 Jeep Cherokee 4.0 245,000 only 70,000 on a new engine. I'm having random flooding causing large amounts of black smoke on startup and stalling when driving I have had this problem before and replaced the TPS and I went away about a year later it's back and just replace the TPS under warranty and I didn't fix it so I need some help I am very mechanically inclined. I have checked all sensors and reset the computer and checked all the spark plugs and gap. Don't know if related but I replaced the motor mounts with brown dog urethanes and also the dizzy due to the old one having a failed seal. So Fire Away
05-02-2014, 08:36 PM
#3
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Location: Oroville, CA
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Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
The coolant temp sensor could be sending wrong information to the PCM. If the PCM thinks the engine is cold it will want to add fuel.
05-03-2014, 08:45 PM
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Year: 1992
Model: Cherokee
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Sorry for taking so long to reply. I have checked the coolant temp sensor and it is within values but I might just replace it just because. I might just have to pull the fuel rail to and check the injectors. When I have time I guess.
05-03-2014, 08:53 PM
#5
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Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
No need to pull the rail just yet. Put a fuel pressure gauge on the test port and let the engine run for a few minutes. Now shut the engine off and watch the gauge, it should hold pressure. If it drops to nothing quickly then you should start looking at the injectors to determine which one is the culprit.
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