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 Post subject: crank sensor
PostPosted: Tue Jul 31, 2012 6:33 pm 
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hi all i am having trouble getting a crank sensor for my jeep main dealer will not have any in stock for 10 days. anyway i found a shop on ebay but they need a part number it is a 2004 jeep cherokee or liberty 2.5 crd can anyone help many thanks dave.posting.php?mode=post&f=5#


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 Post subject: Re: crank sensor
PostPosted: Tue Jul 31, 2012 6:56 pm 
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Tonycrd posts here. He and his 2.5 live in Spain. Posting your location would help get you what you need.

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 Post subject: Re: crank sensor
PostPosted: Tue Jul 31, 2012 7:03 pm 
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yes sorry i am in bristol in the uk


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 Post subject: Re: crank sensor
PostPosted: Tue Jul 31, 2012 7:17 pm 
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Ring George at VM UK he will be able to supply the sensor.


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 Post subject: Re: crank sensor
PostPosted: Wed Aug 08, 2012 4:45 pm 
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ok i have the part number but now i am being told that there is another number on the sensor ?


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 Post subject: Re: crank sensor
PostPosted: Fri Aug 10, 2012 7:36 pm 
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dave90 wrote:
ok i have the part number but now i am being told that there is another number on the sensor ?


I used 5066882AA. What did you find?

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 Post subject: Re: crank sensor
PostPosted: Sat Aug 18, 2012 3:57 pm 
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ok replaced crank sensor and the car still will not start when hot any ideas ?please :oops:


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 Post subject: Re: crank sensor
PostPosted: Sat Aug 18, 2012 10:24 pm 
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Location: Battle Ground, WA
Do you have a stock fuel system, or have you added a fuel pump yet?

Some just can't get rid of the air-in-fuel problems until they switch to a pressurized fuel system.

There's also a device at the end of the fuel rail that releases pressure when it exceeds the max (28k psi or so). If either that valve or an injector is leaking even a little you won't be able to reach sufficient pressure during cranking to let the ECM actually fire the injectors. For the Cummins diesels my fuzzy recollection is that it needed about 4,000PSI before the ECM wouldtrigger the injectors and start the engine.

If you can get someone with a DRBIII you may be able to watch the pressure during cranking to see if it's sufficient.

Mark

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 Post subject: Re: crank sensor
PostPosted: Sun Aug 19, 2012 3:42 am 
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thanks i will try a pump on it today fingers crossed.i did change the fuel filter head with a different head but still the same.hope the pump will help.i will post later with results thanks


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 Post subject: Re: crank sensor
PostPosted: Sun Aug 19, 2012 6:38 am 
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ok i just tried something to test the fuel pressure solenoid/ pcv i got the engine hot disconnected the small fuel return line then cranked the engine and fuel came out suggesting the valve is not shutting dose this sound correct ?the test suggests that the valve should stay shut until the pressure builds up til the injectors fire then it opens letting excess fuel return to tank. :?


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 Post subject: Re: crank sensor
PostPosted: Sun Aug 19, 2012 1:53 pm 
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I think you'll need to find diagnostic procedures to be sure.. from reading this, some flow can be normal: http://goo.gl/7ditv

Note though, if it's taken off the rail and FPR must be replaced as a unit. You cannot re-install, as the knife-edge that seals and the seat form to each other (once only).

Mark

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 Post subject: Re: crank sensor
PostPosted: Tue Aug 21, 2012 1:22 pm 
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dave90 wrote:
ok replaced crank sensor and the car still will not start when hot any ideas ?please :oops:



You need to extract some OBDII codes to find out what it is complaining about. Either get the dealers to read/clear the codes or try the 4 times ON/OFF trick of the ignition.

Once you have some codes you will narrow down the search. :?

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 Post subject: Re: crank sensor
PostPosted: Fri Aug 24, 2012 11:17 pm 
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dave90 wrote:
ok replaced crank sensor and the car still will not start when hot any ideas ?please :oops:

I just replaced a cam pos. Sensor. no problems since

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 Post subject: Re: crank sensor
PostPosted: Sat Aug 25, 2012 9:09 am 
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so did you have the same problem as me ?


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 Post subject: Re: crank sensor
PostPosted: Sat Sep 08, 2012 5:10 am 
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turns out it was a bad injector leaking fuel back. i found this by getting 4 small clear bottles and attaching a tube to each then fixing each tube to the small return on the top of each injector i fixed the bottles to a piece of wood above the engine i then cranked the engine over and found that one bottle was filling up way before the other three . they are not to let anything out until the engine starts .anyway had the injector overhauled and now the car is fine :P


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