Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: jereboam on 27 February 2009, 10:33:10
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The EML (or, as the book calls it, Engine Electronics indicator) has been on more or less continuously recently, although I haven't actually used the car much. The garage have extracted the fault codes, and the only thing showing is the knock sensor. They have checked all the wiring - the rocker cover gaskets have been replaced yet again - and that's OK. The EML light flickers the whole time, so the garage have concluded that the (driver side) sensor itself must have failed - it rotates or something - so they've ordered a new one. It's due to be fitted later today.
Guess what? The lights gone out now.
Any suggestions?
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The EML (or, as the book calls it, Engine Electronics indicator) has been on more or less continuously recently, although I haven't actually used the car much. The garage have extracted the fault codes, and the only thing showing is the knock sensor. They have checked all the wiring - the rocker cover gaskets have been replaced yet again - and that's OK. The EML light flickers the whole time, so the garage have concluded that the (driver side) sensor itself must have failed - it rotates or something - so they've ordered a new one. It's due to be fitted later today.
Guess what? The lights gone out now.
Any suggestions?
Ah - the 'law of the sod' strikes again!
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The EML (or, as the book calls it, Engine Electronics indicator) has been on more or less continuously recently, although I haven't actually used the car much. The garage have extracted the fault codes, and the only thing showing is the knock sensor. They have checked all the wiring - the rocker cover gaskets have been replaced yet again - and that's OK. The EML light flickers the whole time, so the garage have concluded that the (driver side) sensor itself must have failed - it rotates or something - so they've ordered a new one. It's due to be fitted later today.
Guess what? The lights gone out now.
Any suggestions?
Sounds like more poor diag to me.
Particularly as you cant get to the sensor without removing some pretty serious items!
The exact fault codes would be interesting
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Flashing a bulb is one of the best ways to blow it. Does it come on at lamp test still?
EXACTLY what transpired between it flashing and then stopping flashing?
What pattern/frequency is the flashing? Regular or spasmodic? Single or bursts?
You could always have two problems!
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paperclip test?
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Sure correct the Paper Clip Test is your best bet. And post the readings
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The EML (or, as the book calls it, Engine Electronics indicator) has been on more or less continuously recently, although I haven't actually used the car much. The garage have extracted the fault codes, and the only thing showing is the knock sensor. They have checked all the wiring - the rocker cover gaskets have been replaced yet again - and that's OK. The EML light flickers the whole time, so the garage have concluded that the (driver side) sensor itself must have failed - it rotates or something - so they've ordered a new one. It's due to be fitted later today.
Guess what? The lights gone out now.
Any suggestions?
Sounds like more poor diag to me.
Particularly as you cant get to the sensor without removing some pretty serious items!
The exact fault codes would be interesting
Could be rubbish diagnosis - that's why I'm asking here :)
Can't get the exact codes as I'm running out of time, but I was watching over the mechanic's shoulder - the machine gave code 16 and said "knock sensor" - they then spent half an hour playing around with the passenger side wiring :(
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i would bet last time they did cam covers they trapped the knock sensor wire >:(
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Flashing a bulb is one of the best ways to blow it. Does it come on at lamp test still?
EXACTLY what transpired between it flashing and then stopping flashing?
What pattern/frequency is the flashing? Regular or spasmodic? Single or bursts?
You could always have two problems!
Lamp is OK - I turned the ignition off at the traffic lights and the lamp lit when I restarted.
The flickering is constant speed - 10 times a second at a rough guess. The garage thinks it's engine speed related - I don't :(
And nothing happened - it was on when I left home and just went out 5 minutes later and hasn't come back on again.
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got that paperclip yet... ::) :y
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Well 16 is the drivers side bank.
THE only failures of knock sensor I have seen ahve been due to cable damage....on the drivers side due to poor routing following cameblt change resulitng in it either being trapped by the aux tensioner mount or snagging in the aux belt.
For the passenger side, its normaly due to them being trapped by the cam covers.
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The symptoms do sudgest knock sensor issues.....as the ECU light will only come on once the engine is revved and then a rev limit is imposed and the timing retarded resulting in very sluggish performance
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OK, I've just been very brave, and done a paperclip test - codes are as expected - 12, 16, 31.
So driver's side knock sensor is in the frame. The cambelt was done about a year ago, and the problem is recent, so it won't be that. The gasket was done since the fault occurred, and it was only the pasenger side anyway.
So, much as he detests Vauxhall V6s, it looks likes the garage man has got it right. He may not be the best mechanic ever, but as he always points out, he's a hell of a lot cheaper than Marshalls in Ipswich. :)
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(http://i291.photobucket.com/albums/ll307/rehaboam/DSCF0437.jpg)
Ho hum! Cable was trapped between something they referred to as "the tensioner" and the engine block. They said this isn't something they would have removed to do the cambelt. They said it has probably been like that since the car was assembled.
On the other hand, on the way home, I remembered that they had to replace an "idler" bearing a few months back.
Idler? Tensioner? I wonder...
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aux belt tensioner IS normally removed to do the cambelt. The 'idler' maybe the tensioner pulley.