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Thread: camshaft sensor reading problems with cdti 150

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    Default camshaft sensor reading problems with cdti 150

    having major pain with my vectra, had camshaft sensor code put new opel sensor in it, no better, checking with my snap on computer, the cam speed reading is sometimes right, ie half rpm, then itll suddenly prob to 0 or shoot up to 3575 (its min an max readings) i dont no what is going on?! its got a good earth, good 5v feed, i checked continuity between wires and ecu all good, only thing that im not sure of is the reading the signal wire should b giving? as with ignition on it reads 5v, when running (idle ) it usually reads just under 5v. ! anyone have any ideas?! or no for definate is the ecu at fault?

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    came across similar thing recently in a saab - cam sensor fault wouldnt clear and kept coming back - knew sensor fitted still same - checked timing - timing appeared to be ok - however after continual searching and after scooping cam and crankshaft pattern did not look right - crank pulley was removed following information found on tech bulletin - back of crank pulley where the key sits was damaged causing pulley to be slightly in wrong position - new pulley fitted and belt kit - perfect! so say this effects all saab and vauxhall with 1.9cdti around 2007 - incorrect tightening torque of crank pulley bolt at factory

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    was it worn? apperently the key way wears, gota check that yet

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    bump!! any one shed any light?

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    bumping this majorly confused now, i checked the timing, and it was off a full tooth!! so i retimed it, started it was spot on drove it, drives perfect now no flat stops or laggy, then the light came on again now its hard to start, and with op com and tech 2 camshaft speed reading is always either 0 or 3575, last thing to try now is a crank sensor , other than that im totaly stumped anyone shed any light on this for me

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    I would recheck the timing again.

    Make sure the camshaft pulley & key isnt worn/damaged from incorrect tightening torque of the camshaft bolt.

    I think Zerobug3000 has pointed you in the right direction already

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    Sorry I didn't see reply. This had exact same faults as the Saab we were working on. Hard to start and sometimes not starting at all. And cam sensor fault. Did you take the pulley completely off and check the keyway? If you didn't then would seriously suggest taking it apart again. The crank pulley bolt on ours was a complete pain to get off with very powerful air gun. Lock it all up with timing pins and get that pulley off. I am confident you will find your problem. If so new pulley and key required. From memory were pretty good price from vx.

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