4.6 Running lean pinking

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eightinavee said:
You have it the wrong way round ! The crank sensor is the all important one - it has no backup,so must work or the engine wont go.It is not just for TDC either,it is used for overall engine speed AND misfire detection.The ecu watches the gaps between crank sensor pulses to see if each individual firing event takes place.If the pulse gaps narrow it can tell a cylinder has fired,if the gaps widen it knows the crank has slowed down - then will log a misfire.If the misfire is persistant it will store a DTC.
That it runs without the cam sensor is normal,it just cant tell that cyl,s are on compression or exhaust strokes,so runs bank fired not sequential and disables the knock sensors - hence the OP's engine pinking.All his engines symptoms add up,scoping it would soon show whats going on....
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I just said I'm surprised coz the systems I've been directly involved with worked the other way round - but I know nothing about Motronic and its backup strategies for running and am perfectly happy to defer to you greater knowledge on the subject! I was basing my assumption my on bike requiring cam sensor info to run (start) because it has no CI backup strategy and a Ford system I was 50% of the ECU coding team on didn't either! :)
 
remedave said:
Phone up my local dealer, yeah ….. not getting that then why the hell would it be so expensive ?
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I can give you something a lot dearer than that from Land rover. 12" of brake pipe with two tube nuts for P38. One side £36.00. Other side, same pipe bent in opposite hand £76.00. Land rover spares pricing policy is a true enigma.
 
Back to the RR new crank sensor fitted still the same.

can it be that some of the teeth on the fly wheel are missing ? it doesn't seam to have any access plate

error code is still camshaft position sensor / wiring p0340 i have wiggled pulled and inspected the wiring to the plug under the header tank to the sensor

its the original thor engine fitted well the block numbers match so the cam gear must be correct, that leaves the teeth on the flywheel but before this i need real time data anyone know any good software as i said i no longer have this gear just basic
 
Have you checked power from fuse 26 to pin 3 cam sensor. Continuity pin 2 sensor to pin 20 ECM. Continuity from pin 1 sensor to ground.

Crank sensor. Continuity pin 32 ECM to pin 1 sensor. Pin 2 sensor to pin 46 ECM. Pin 3 sensor to pin 45 ECM (shield). Get the multimeter out.
 
wammers said:
Have you checked power from fuse 26 to pin 3 cam sensor. Continuity pin 2 sensor to pin 20 ECM. Continuity from pin 1 sensor to ground.

Crank sensor. Continuity pin 32 ECM to pin 1 sensor. Pin 2 sensor to pin 46 ECM. Pin 3 sensor to pin 45 ECM (shield). Get the multimeter out.
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Will do i will jump on it today, can you confirm this information is for a 2002 Thor.
 
Continuity pin 2 sensor to pin 20 ECM.

Cannot find pin 20 ecm Obviously it bottom row second connector but its not there in the connector doesn't look like its dropped could this be a revision? can you please check its pin 20 again thanks !!
 
pin 1 cam sensor earth good
pin 3 pos good

can find were pin 2 goes i have probed every ecu pin no signal its a blue wire
 
remedave said:
pin 1 cam sensor earth good
pin 3 pos good

can find were pin 2 goes i have probed every ecu pin no signal its a blue wire
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Should be a Grey/Blue wire from pin 2 sensor to pin 20 ECM connector CO636. Via connector CO176. That should be R/H front of engine compartment somewhere near oil filter or thereabouts. A black connector.
 
Last edited:
Sorry my testers fault,

results all ok no faults found

its either ecu or mechanical looks like i need data now
 
wammers said:
Ok a least you are reducing the options.
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running out of options !!! it must be mechanical looks like i will check the fly wheel teeth then strip of the front end uggghhhh

but before i do that i need some data thats bound to point me in the right direction, any recommendations if i invest ?
 
Just checked the fly wheel through a small inspection hole near the side of the block its no got teeth like people say it has a grove with holes drilled in every couple of centermeters and a line for tdc and at this point the gap is different so that rules that out too must be a crank issue
 
Clutching at straws been looking for a part number for a gems camshaft sensor and a 2002 thor camshaft sensor can find them but maybe just maybe they are different ?

I know the cam sprocket is so maybe the sensor is ?

the fly wheel is different and the crank sensor was modified to suit so maybe they modified the cam sensor too hence why its got no signal

just clutching at straws
 
Its only the sprocket that's different,cam sensor is the same.I suggest you take the cam sensor out and use a torch/mirror - or better still an endoscope to see what the cam sprocket is.Until the ecu can see a plausible signal from the cam sensor it will throw the code and disable knock sensing etc.
 
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