Jeep Liberty Crank No Start - Part II
video description
Just a huge find. lot of parts thrown but EVERY one was proven bad. Long repair for what should be one thing. I get in trouble for spending too much time on a car, I have to meet my appointments. Fix it Right! I like your process and everything was absolutely amazing to watch!
Date: 2020-08-05
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Comments and reviews: 9
CUDDLES52
her is why you had a crank sensor code after the crank sensor was replaced once the cam sensor signal screwed up the pcm lost the crank sensor signal while it saw a cam sensor even though the cam signal was crap so the pcm saw a cam signal and no crank sensor signal during the fault so it set a false crank code this same scenario can happen when the crank sensor also goes nuts and the pcm sees a crank signal but no cam signal so watch those codes they can be misleading on chysler systems
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her is why you had a crank sensor code after the crank sensor was replaced once the cam sensor signal screwed up the pcm lost the crank sensor signal while it saw a cam sensor even though the cam signal was crap so the pcm saw a cam signal and no crank sensor signal during the fault so it set a false crank code this same scenario can happen when the crank sensor also goes nuts and the pcm sees a crank signal but no cam signal so watch those codes they can be misleading on chysler systems
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Fred
This scenario is what drives widgets like me crazy. You had multiple problems all contributing to the original symptom. I used to tell my customers that sometimes you have to troubleshoot these things like peeling an onion. You cant see the next problem until you fix the first one, or the second one, or the.
For what its worth my troubleshooting wasnt on cars. It was something far more complicated (MRI scanners) but the principles are exactly, and I mean exactly, the same.
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This scenario is what drives widgets like me crazy. You had multiple problems all contributing to the original symptom. I used to tell my customers that sometimes you have to troubleshoot these things like peeling an onion. You cant see the next problem until you fix the first one, or the second one, or the.
For what its worth my troubleshooting wasnt on cars. It was something far more complicated (MRI scanners) but the principles are exactly, and I mean exactly, the same.
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PhatboyHD88
I just dont understand why you continually start it over and over, when the cam sensor acts up it. your using a customers car as a ginny pig if it is back feeding into the coils or whatever you are putting unnecessary stress on his coil packs injectors and other electrical components shortening their life for the sake of your own personal need to know. if i was that customer i would be PISSED! Burning out my components man Im disappointed.
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I just dont understand why you continually start it over and over, when the cam sensor acts up it. your using a customers car as a ginny pig if it is back feeding into the coils or whatever you are putting unnecessary stress on his coil packs injectors and other electrical components shortening their life for the sake of your own personal need to know. if i was that customer i would be PISSED! Burning out my components man Im disappointed.
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Thom
As a mechanical engineering student of 40 years ago the first rule drilled into our heads was-Simplicity, Simplicity, Simplicity, which judging by today's vehicles is no longer taught. They are too reliant on too many overly sensitive sensors, chips and schizophrenic electrical components. Yes today's vehicles are more fuel efficient but then again you didn't require a trunk full of scanners to diagnose a vehicle back then either.
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As a mechanical engineering student of 40 years ago the first rule drilled into our heads was-Simplicity, Simplicity, Simplicity, which judging by today's vehicles is no longer taught. They are too reliant on too many overly sensitive sensors, chips and schizophrenic electrical components. Yes today's vehicles are more fuel efficient but then again you didn't require a trunk full of scanners to diagnose a vehicle back then either.
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autos
Sorry for commenting on old videos, but it seems to be a PCM software bug where the PCM is ignoring the key off if the CKP sensor signal is missing. The CKP signal is being replaced with reference values, and in that process the PCM is ignoring the key off condition and just listening to crazy CMP sensor signal, firing away the coils and injectors like the car were running. Buggy software.
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Sorry for commenting on old videos, but it seems to be a PCM software bug where the PCM is ignoring the key off if the CKP sensor signal is missing. The CKP signal is being replaced with reference values, and in that process the PCM is ignoring the key off condition and just listening to crazy CMP sensor signal, firing away the coils and injectors like the car were running. Buggy software.
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XqeDiosXqe
there is absolutely nothing wrong with this vehicles. Chrysler/Jeep makes them this way so that you can spend a lot of money. That also explains why the radiator return water plastic tank is sitting right on top of the spark plugs and engine valve cover / engine block, so that when overheats it automatically blows your head gaskets after water falls on top of it. Am just saying.
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there is absolutely nothing wrong with this vehicles. Chrysler/Jeep makes them this way so that you can spend a lot of money. That also explains why the radiator return water plastic tank is sitting right on top of the spark plugs and engine valve cover / engine block, so that when overheats it automatically blows your head gaskets after water falls on top of it. Am just saying.
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DIY
I realize this is an older video, but I'm still going to try asking what may be a naive question: With the crazy cam sensor inputs creating these insane RPM readings to the tach, why on earth would is there no intelligence in the computer to say, this RPM reading is impossible and shut the vehicle down rather than let the thing possibly self-destruct?
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I realize this is an older video, but I'm still going to try asking what may be a naive question: With the crazy cam sensor inputs creating these insane RPM readings to the tach, why on earth would is there no intelligence in the computer to say, this RPM reading is impossible and shut the vehicle down rather than let the thing possibly self-destruct?
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John
I think you may have found the source of power that melted down the coil. Key on engine off oh, that sensor was still going bananas and everything was firing injectors and plugs. Theoretically I would think that that sensor could go nuts just sitting there key on engine off. If that was my Jeep Liberty I would be trading that puppy in tomorrow
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I think you may have found the source of power that melted down the coil. Key on engine off oh, that sensor was still going bananas and everything was firing injectors and plugs. Theoretically I would think that that sensor could go nuts just sitting there key on engine off. If that was my Jeep Liberty I would be trading that puppy in tomorrow
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JoeJ94611
Theres an old expressioncuriosity killed the cat. Pumping lots of unburnt gas into a catalytic converter can overheat it and cause hidden damage. Cats contain precious metals such as platinum, palladium& rhodium so they are expensive.
Eric knows what he is doing but he was risking too much to create an entertaining educational video.
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Theres an old expressioncuriosity killed the cat. Pumping lots of unburnt gas into a catalytic converter can overheat it and cause hidden damage. Cats contain precious metals such as platinum, palladium& rhodium so they are expensive.
Eric knows what he is doing but he was risking too much to create an entertaining educational video.
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