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[steve6367]

19 is deffinately crank sensor. Irrespective of engine on or off.

Clean icv as well.

Tried to order one today, but apparently need to know it is has a round or square connected - so will have a look tonight and get it ordered 

To be honest I can't tell looking at the car!

Does anyone know which of 90492006 or 90492061 it is likely to be?

That one, which is cheaper and in stock  Everyone else may know already, but the part number is printed on the sensor.

[TheBoy]

Is it that stupid unnamed code reader?

Is it going closed loop?

Yes - data linked here, if that helps?

https://www.dropbox.com/s/iozhtcugjis3lsj/2.5%20Estate.xls?dl=0

Its a shit to read, but all looks about right for a 2.5 (assuming you hadn't just cleared codes within the last 10 miles).

Change crank sensor, and see what happens. If the lamda ones remain, it'll be time to dust off the multimeter.

[steve6367]

Thank you 

Cleared about 300 miles (mostly motorway) before this.

Is it the 'steps' 128 that represents the trim?

New sensor is here tomorrow so I will get it on and report back.

[steve6367]

Sensor fitted and after a short test drive no codes logged. Data now looks as below, if the 'steps' are the trim they have changed quite a lot.

https://www.dropbox.com/s/5s3lbiidj4dcq9t/Livedata_1998%20%28W%29_Omega-B_Engine__X%2025%20XE_201506052126%20post%20crank%20sensor.xls?dl=0

Still does not seem to drive quite as it should, almost as if slight misfire - think I will 'access' the dispack next and see how that looks.

Any thoughts on the new data welcome 

[TheBoy]

Was engine warm, as MAF is far too high, and the trims are all over the place

[steve6367]

Was engine warm, as MAF is far too high, and the trims are all over the place

Yes was warm - that was a short drive around the block.

I have 2 x 2.5's here so would a MAF swap and test be logical?

[steve6367]

Have coil pack out now, looks perfect no cracks etc - no markings or GM part numbers though - does that indicate non-genuine?

Measured:

9940 ohms 1 to 4
9970 ohms 3 to 6
9950 ohms 5 to 2

1 ohm - 1 to 4, 2 to 4 & 3 to 4 on the multi plug.

They are consistent, but consistently out of the specified range.

Is that a good test?

Steve

[steve6367]

Does this look GM?

[steve6367]

Any thoughts anyone?

(I've ordered a new Bosch coil pack today) - started at VX but even TV was £123+vat - Plug leads are NLS.

[Diamond Black Geezer]

Plus leads - get Bosch Vectra V6 ones! 

Omega ones are a smidge more expensive, but the Vectra ones do fit. (not opinion, fact: I'm running a set of brand new Bosch Vectra ones myself) Also there are more Vectras out there, more modders, more demand etc.. so you can often find a 'deal' on Vectra HTs /NOS wheras a place might say they're out of stock or have to order them in special for Omegas 

That looks identical to my DIS pack, but I cannot say whether GM or not. No marks at all on mine, I have an old rusty GM one in the spares-for-the-bin box and it's marked up with a sticker/part numbers etc, so I'd suspect not. Not that that's automatically a bad thing, though. As I say, I'm running on one and she runs fine. If you've ordered a Bosch coilpack you should be fine 

[steve6367]

Bosch dis pack fitted and absolutely no difference! 

[steve6367]

Bosch dis pack fitted and absolutely no difference! 

HT leads next?

[TheBoy]

Bosch dis pack fitted and absolutely no difference! 

HT leads next?

If you suspect HT issues, yes.  Genuine are stupidly expensive, I'd be looking at pattern.  I'm sure somebody here said they managed to pick up a branded set for only a few quid.

[steve6367]

Bosch dis pack fitted and absolutely no difference! 

HT leads next?

If you suspect HT issues, yes.  Genuine are stupidly expensive, I'd be looking at pattern.  I'm sure somebody here said they managed to pick up a branded set for only a few quid.

I suspect only because it's misfiring and I've already changed the coil pack. Can't see any tracking in the dark and the look cosmetically ok. Plugs have been changed already. I would like to have more evidence really, but not sure what else would be causing a misfire.

The VX HT lead were £80 a side on TC and NLS!

[TheBoy]

I assume you've had all the plugs out and checked them?

Misfires with no fault codes (on 2.5 and 3.0) are generally HT, thus normally DIS, leads or plugs.  You've crossed off DIS already.

I think it was Nick W who said he'd got some cheap, might be worth a  search, or a PM to him