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[Ady]

I've changed both coil packs for new bosh ones. Replaced spark plugs for bosh super plus 4 prongs.

Now car is miss fireing worse than ever? The engine management light is on constant and flash when I boot it. Tho it accelarats well but idles poor and splutters when I start to pull away.

Any idears on what else I could replace of is it possible that a coil could be faulty from manufacture.

Did the pedal trick and it's 10 3 10 10 (random miss fire)

Can I reset codes using pedal trick?

Thanks

[The Red Baron]

any oil down the plug holes?

[Ady]

No oil, but there was last month and had the gaskets changed.

[Andy H]

Seems odd that there are no useful codes

The quickest way of solving the issue would be to get someone with Tech2 to look at the live readings & fuel trims to see what is amiss.

Might be worth unplugging the MAF to see if it runs any better with it disconnected - (sometimes the MAF gives incorrect readings without flagging up a code, unplugging it does bring up a code but also forces the ECU to run in limp home mode and use factory fuel settings)

[martin42]

Check connections on coil packs,did you use new rubber boots on them?

[omegod]

Have a very good look at the vac pipes at the front of the engine, if one is disconnected it can cause mayhem

[Ady]

What a numpty 

As I was being lazy and couldn't be bothered to remove the fuel pipes, I squeezed the coil packs in and one of the rubbers got stuck and missed cyl 5 spark plug. I've now made the effort to remove the fuel pipes and refitted the pack and all running really well now.

Had a mate reset codes and check all is running well 😃

Thanks for all the suggestions but this time it was me being a numpty.