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  #13  
Old 09-17-2013, 04:37 PM
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Re: No start condition. Cam Position Sensor indicated.

Yes, checked all three wires for short to ground or each other. Harness seems clean. Wondered about internal mechanical failure as well. Not having a lift, it is going to be tough to visualize the trigger through the sensor hole. Guess I will try but looks like the Jeep is dead at least until next weekend. Thanks for all your help. Please keep an eye on this thread for a while as I am not giving up yet.
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  #14  
Old 09-17-2013, 04:49 PM
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Re: No start condition. Cam Position Sensor indicated.

Just to rule one more thing out, check the G200 ground connection (inside the center console). Very common in WJ's for this to be loose/rusted. (G200 is the ground for the cluster, BCM).
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File Type: pdf Ground_G200_WJ.pdf (56.5 KB, 4 views)
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Old 09-17-2013, 11:30 PM
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Re: No start condition. Cam Position Sensor indicated.

If it will be impossible to see the cam sensor tone ring, then the only way to see it clear is by removing the valve cover.
The ground lug G200 where Milous was talking about, also supplies the ground to the SKIM, the imobilizer module, besides for many other components. How is the SKIS key symbol on the instrument panel, is it coming on when switching ignition in run and will go out soon thereafter?
I don't say that this ground can't be the problem, but also don't see any interconnection with it to the stored CPS fault in the PCM.
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  #16  
Old 09-19-2013, 04:40 PM
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Re: No start condition. Cam Position Sensor indicated.

I think we both may be missing the obvious here. If the Jeep jumped time or broke the timing chain (unlikely as it failed with a miss then no restart, not a lockdown), would it likely not show the same cam sensor position fault?
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Old 09-19-2013, 04:49 PM
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Re: No start condition. Cam Position Sensor indicated.

I should add that, yes, the security symbol indicates as it should and goes out. I checked my door frame bus wireing (earlier post) and it came back clean. At this point really thinking either computer or internal.
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Old 09-19-2013, 10:52 PM
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Re: No start condition. Cam Position Sensor indicated.

Quote:
Originally Posted by Doug4230 View Post
I think we both may be missing the obvious here. If the Jeep jumped time or broke the timing chain (unlikely as it failed with a miss then no restart, not a lockdown), would it likely not show the same cam sensor position fault?
Not sure what you try to say here. You still have the same cam sensor fault code. The fault code you are having is regarding the cam position sensor circuit, which seems to be electrical, but the PCM is looking for pulses from the cam sensor, because it sees the pulses from the crank position sensor. If for whatever reason the target wheel doesn´t pass the cam sensor, the PCM doesn´t know this, but probably will suspect something wrong electrically.
I would at least check the mechanical part out, before buying an other PCM
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Old 09-25-2014, 03:52 PM
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Question Re: No start condition. Cam Position Sensor indicated.

Allright. Gave up on this last Fall and bought another used Jeep (98 6cyl). Back into it now assuming timing chain issue. NOT an electrical issue. Engine is apart to the cams exposed. Chain was thrown completely off the right side (cam position sensor side) cam drive gear. Still in place on the left side but likely has "jumped" teeth. How do I set TDC (I understand that I ultimately need exhaust but finding compression first is likely the way to go)??? Compression tester is showing me nothing turning by hand (only option unless I spin the engine with a drill/impact driver). I am betting everything is out of sequence. Where do I start? I have not pulled the timing chain cover yet because I wanted to see the TDC mark on the balancer.
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Old 09-25-2014, 04:04 PM
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Re: No start condition. Cam Position Sensor indicated.

The 4.7 being an interference engine, you can expect some bend valves.
The left and rights chains are independent from each other, so one side probably is still set ok. Attached the manual pages for setting the timing.
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File Type: pdf 4.7 timing.pdf (640.6 KB, 1 views)
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  #21  
Old 09-25-2014, 04:17 PM
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Re: No start condition. Cam Position Sensor indicated.

I think the real question is: If I have NO CLUE where the camshafts are in relation to the crankshaft, can I use the marks under the timing chain cover (on the gears) to correctly set the engine up???
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Old 09-25-2014, 04:28 PM
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Re: No start condition. Cam Position Sensor indicated.

I am also worried about the potential bent valve possibility. The initial failure was a miss, followed by a shut down at fairly low speed. After that it was in a no start situation so the only impact on valves was at starter speed. Is that enough to produce significant damage?
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Old 09-25-2014, 04:30 PM
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Re: No start condition. Cam Position Sensor indicated.

Yes, you have to use those marks, but be carefull by turning the camshaft, because a valve can hit a piston (if not already happened)
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Old 09-25-2014, 04:34 PM
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Re: No start condition. Cam Position Sensor indicated.

The engine most probably did shut down because of the camshaft which was not rotating anymore. Since the engine doesn´t stop imediately, there is a big change that a valve was hit. You probably first have to set the timing and then check the cylinders for compression.
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