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mechanic79
User
Dec 14, 2011, 7:15 PM
Post #1 of 20
(2059 views)
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the car will only run when you turn the cam sensor 180 degrees from mounting position. whats up with that?
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 14, 2011, 7:18 PM
Post #2 of 20
(2054 views)
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Re: crazy cam sensor
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Don't know what is up with that because we don't know what mystery car your working on.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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mechanic79
User
Dec 14, 2011, 7:23 PM
Post #3 of 20
(2049 views)
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Re: crazy cam sensor
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sorry bout that, its a 06 nissan sentra with a 1.8 automatic
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 14, 2011, 7:26 PM
Post #4 of 20
(2044 views)
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Re: crazy cam sensor
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Is this the original sensor or a replacement sensor that does this?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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mechanic79
User
Dec 14, 2011, 7:30 PM
Post #5 of 20
(2040 views)
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Re: crazy cam sensor
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ive tried the replacement and the original, if you mount it back in the bolt hole, the injectors and plugs will only fire one time untill you hit the key a second time. computer, cam and crank sensors are new
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 14, 2011, 7:36 PM
Post #6 of 20
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Re: crazy cam sensor
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That's strange. If you rotate the sensor 180 degrees, the computer will fire the injectors and coil like it should on the first key start, but in the mounted position it doesn't run until you start it a second time?
Is the engine controller setting any codes when the sensor is mounted in the correct position?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Dec 14, 2011, 7:39 PM)
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mechanic79
User
Dec 14, 2011, 7:46 PM
Post #7 of 20
(2026 views)
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Re: crazy cam sensor
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i have a shop, and receieved the car from another mechanic. when i got it the car would not run at all. i checked the injectors with noid light and when you turn the engine over, you only get one ground pulse to the injectors. and the coils will only fire one time. so i ran wires, for defects or burns and found nothing. and after changing the computer, cam, and crank sensor the car was doing the exact same thing. i just got to messing around with the sensor and turned it 180, and it fired off and runs perfect. thinking i had a defective cam sensor, i tried a OEM sensor and found the same problem. i know it sounds crazy but its true.
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 14, 2011, 7:51 PM
Post #8 of 20
(2011 views)
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Re: crazy cam sensor
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Do you have a scope?
Did the other mechanic do any engine work or had the valve cover off?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Dec 14, 2011, 7:53 PM)
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mechanic79
User
Dec 14, 2011, 7:53 PM
Post #9 of 20
(2005 views)
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Re: crazy cam sensor
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yes.
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 14, 2011, 7:55 PM
Post #10 of 20
(2002 views)
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Re: crazy cam sensor
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Yes, you have a scope? Or yes, they did work?
If they did work, what did they do?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Dec 14, 2011, 7:58 PM)
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mechanic79
User
Dec 14, 2011, 7:59 PM
Post #11 of 20
(1996 views)
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Re: crazy cam sensor
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yes, i have a scope. the other man didnt do anything but put a crank senson in it. ive pulled the valve cover to be sure the relucter gear on the cam was not damaged in any way and found nothing. do you know what the crank sensor picks up off of? is it a fixed reluctor gear on the crank or something that could have moved?
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 14, 2011, 8:18 PM
Post #12 of 20
(1983 views)
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Re: crazy cam sensor
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Near the end of the crank inside the engine block there is a signal plate that interrupts the crank sensor.
Did you scope the crank and cam sensor signals?
Here is what the pattern is susposed to look like:
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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mechanic79
User
Dec 14, 2011, 8:24 PM
Post #13 of 20
(1977 views)
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Re: crazy cam sensor
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thats some helpfull info. ill try that tomorrow. if im not getting that reading, what do you recomend?
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 15, 2011, 4:28 AM
Post #14 of 20
(1953 views)
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Re: crazy cam sensor
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Regardless of what you find, do not start any more new threads on this subject. You already have 3 open for the same problem.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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mechanic79
User
Dec 15, 2011, 6:47 PM
Post #15 of 20
(1923 views)
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Re: crazy cam sensor
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sorry, im new to the computer, can you tell me how to delete an old thread?
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 15, 2011, 6:50 PM
Post #16 of 20
(1918 views)
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Re: crazy cam sensor
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We'll deal with that. You just need to respond to just one thread you already have open and not open any more.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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mechanic79
User
Dec 15, 2011, 6:57 PM
Post #17 of 20
(1913 views)
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Re: crazy cam sensor
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thanks, wasnt sure how to use this
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mechanic79
User
Dec 15, 2011, 7:08 PM
Post #18 of 20
(1908 views)
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Re: crazy cam sensor
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anyway, just to let you know i found the problem, the crank had jumped 1 tooth. but thanks for the advice.
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 15, 2011, 8:19 PM
Post #19 of 20
(1899 views)
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Re: crazy cam sensor
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You know that is odd. I was in IATN reading some threads and a lot of techs are finding the chains jumping on those. I guess rotating the sensor changed the angle of where it reads the interrupter on the cam.
Did you scope the signals and find they were out of sync with each other?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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