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[Ulap31]

Dear all,
I have an omega 3.2 auto.
It's still not running right.
 Problems are runs slightly rough on idle and smells like it's over fuelling when cold.
When it's warm and on a run it starts pinking under load, also cooling fans come on at about 90 but once temperature down to 85 they're not switching of.
So far I've put a new contitech timing kit, new knock sensors new maf new dis packs, new thermostat, water pump plus moved exhaust sensor on drivers side
Fault codes that I'm getting via pedal trick are
0300,0304,0303,0325,0330,0300,0304
As you can see it throws some codes up twice
I have posted on this before but not really used the car for awhile

[Lazydocker]

Sort the misfires out first, both banks. 

[Ulap31]

Ok been trying to get misfires sorted but not getting anywhere.
Any ideas as I'm losing patience with it.

[Kevin Wood]

First thing to check is for oil / water in the spark plug wells.

[baggers]

Well you have codes showing "knock sensor" and you say you have pinking.
ECU temp sensor working ok?
EGR valve, causing rough idle & raised cylinder temps (pinking).

[Ulap31]

Thanks for replies
Now I'm confused as I didn't think there was an egr valve on these so would be grateful of some insight into where that is.
Also where is the ecu temperature sensor.
When I replaced dis modules did notice small amount of rusting to right side bank but have since done the skittle seal as mentioned on the forum

[05omegav6]

Deffo no EGR so ignore that

It's a bodge, but unplug the ecu, both plugs, wait an hour... Use the time to check all the plugs around the engine, paying attention to the coil packs, both knock eensors and the cam sensor. Have a cup of tea...

Then reconnect the ecu. Do pedal trick and note the numbers. Then take the car for a good run, twenty miles should do it. Then redo pedal trick and report back with the two results

[05omegav6]

Ecu temp sensor is on the coolant bridge, but generally reliable...  Needs decent code reader to confirm ecu temp is broadly the same as the gauge.

[Ulap31]

Will try that at some point tomorrow.
Didn't want to disconnect ecu before as I was told it would need to be taken to vx to be reprogrammed,
Thanks for the advice will post again tomorrow

[05omegav6]

Will try that at some point tomorrow.
Didn't want to disconnect ecu before as I was told it would need to be taken to vx to be reprogrammed,
Thanks for the advice will post again tomorrow

If it does kill it I have a spare...

Joking aside, it will be fine... Just needs a decent run after as it resets all the fuel trims etc to a default setting and it takes a few miles of mixed driving to adapt to the actual sensor readings, hence the before and after pedal tricks

[Ulap31]

Right done pedal code and it was what I said in original post so I disconnected ecu for an hour. Checked coil packs they look fine checked plug wells looks like it had a problem in the past, rust residue on top of the alloy part near 2 of the plugs.
This was on the passenger side there's no water signs now though.
Checked the breather pipes the look nice and clean
Checked wiring no nicks or rusted connectors.
Reconnected ecu took it for a long run and it ran like its missing on a couple of cylinders.
Now the faults are none just keeps flashing with no gaps

[05omegav6]

Have you checked/changed the plugs?

Flashing with no gaps suggests no codes present, which suggests that the loom and coil packs are indeed sound...

[Broomies Mate]

What plugs are fitted?  Please don't say Champion. 

[Ulap31]

Spark plugs fitted are the Vauxhall originals which was one of the first things I changed when the problems started

[baggers]

Deffo no EGR so ignore that


Never worked on a 3.2, I know now