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[tunnie]

Jonny, at my parents I have a pair of coil packs I bought for my 3.2 as "spares" - Think I bought them either from Albs or Twiglet, can't remember now 

Either way, they are still wrapped up in my garage. Next time I'm back home, I can post them to you, use them to see if it makes a difference? (2.6/3.2 are same for coil packs)

Normally I can't see coil pack failing just after cam cover change, but this thread has almost exhausted everything else 

[albitz]

Wasnt me Mark,must have been Twigs. Thats a very decent thing to do btw.The OOF spirit in practice once again.

[tunnie]

Wasnt me Mark,must have been Twigs. Thats a very decent thing to do btw.The OOF spirit in practice once again.

Ahh ok, I bought several things from you guys at the same time, could not remember what I got from who 

[jonny2112]

Jonny, at my parents I have a pair of coil packs I bought for my 3.2 as "spares" - Think I bought them either from Albs or Twiglet, can't remember now 

Either way, they are still wrapped up in my garage. Next time I'm back home, I can post them to you, use them to see if it makes a difference? (2.6/3.2 are same for coil packs)

Normally I can't see coil pack failing just after cam cover change, but this thread has almost exhausted everything else 

That's extremely kind, thank you very much.
And I think you're right ............. 

[jonny2112]

Wasnt me Mark,must have been Twigs. Thats a very decent thing to do btw.The OOF spirit in practice once again.

Slipped up there pal 
And yes, extremely generous 

[Marks DTM Calib]

Not convinced......having two coil packs fail at the same time on cylinders that happen to 360deg apart on firing angle.....

Adding more unknowns to the mix is not to be advised, diag is the key at this stage (hence the check for a spark  )

[Marks DTM Calib]

If there is a problem with the coil pack, bearing in mind I have swapped some plugs to no avail, and there is a missfire, could that possibly cause such a racket? And would the knock sensors be reacting to the missfire?
I haven't checked the spark yet as Master directs, as I'm not entirely confident in carrying it out, so not sure there is a problem, but just trying to work it out in my head 

That noise you hear is a miss fire from the engine not running smoothly as a result (heard such before).

Knock sensors will detect the clatter (seen them detect buggered alternator bearings before on the 1-3-5 bank!) and/or raise a code as a knock 'is missing' (less likely on the 2.5/3.0 but true for the 2.6/3.2).

Its easy enough to do the park test.

Simply pull the pack on the 1-3-5 bank, insert a suitable item into the plug boot so there is a gap of 20-30mm to a metal grounded item and give it a quick crank over.

[amba]

Could you not do it with a spark plug test light that way you would still see the spark.

[jonny2112]

Could you not do it with a spark plug test light that way you would still see the spark.

Would you believe the only place I can get one is the bay? I had a look yesterday after Mark mentioned it and none of my local factors have one.

[jonny2112]

Coil pack is out and just going to put the plenum etc back on. Hopefully there'll be enough play in the connector to allow the pack to be reconnected and manoeuvred.

[amba]

You really would be better getting an "in line type " .Sealey do that type with a probe with a light chamber and plug cap on about 100mm of lead.They work fine on an Omega as they are long enough to reach down onto the plug.

I have 2 as found that way you can test adjacent firing plugs,although I have older set up of plugs /leads and Dispack.

Would have thought decent factor would stock them...try search for Sealey stockist close to your home postal code.

[Marks DTM Calib]

You realy want a stand alone one with an adjustable gap but it can be done as already described with a bit of ingenuity.

We dont want the plugs in the equation for this task, as simple a test as possible.

[jonny2112]

Would a screw inserted in the boot be sufficient? I've tried this first and am not getting a spark to any of the bank so guessing its not enough?

[jonny2112]

Right. Felt a spark using a circuit tester (I know  ) across all three on the drivers bank.
Haven't tried passenger side yet. Is there anything else I should try before refitting the coil pack, removing and replacing the plenum, etc?
Also, if the misfire isn't in the coil, where next? I've ordered new plugs, though I had already swapped two to test on this bank.

[Andy H]

May not be relevant but......

When I changed my thermostat I found it easier to undo the bolts securing the inlet manifold if I unplugged the injectors first.

I imagine that failing to securely attach the injector plugs would have caused misfires on the cylinders they served