Vectra C 2.2 Misfire on Cylinder 3 + 4

[m2yuout]

Hiya guys, just wondering if anybody can shed any light, brought a Vectra 2.2 Direct last week its @ 110K, It went into limo mode earlier, after plugging into the diagnostic it said cylinder 3 + 4 Misfire. The car runs weird when cold, but 100% okay when its warmed up! Any Ideas guys?

[maud2450]

Compression test m8,sounds like head gasket,or ignition module.

[m2yuout]

Ahhh right, well im gonna eliminate the cheaper options first, im thinking spark plugs, coil pack maybe? am I on the right tracks?

[vectra ste]

i was thinking try new plugs first followed by coilpack

[rushy]

Does it go into limp when you get to about 3000 revs?

[m2yuout]

No, over the last few days i noticed the car and spanner come on in the odometer, when this comes on the car has been running a bit lumpy all of this only happens when cold, as soon as the engine has warmed up everything is 100% fine all day long.. its just that initial first drive in the morning.
Cheers for your help so far guys

[GCusdin]

Soo many of us with 2.2 suffering from misfire.
A few of us have done various things.
Start with plugs and coil and other possibilities are fuel pump and FPR (fuel pressure reg).
So far I have changed plugs, coil and pump and no differance. FPR this weekend and checking throttle body for gaps and other areas.
Compression test can give better indication. I was told cold is fuel pump but I just bought 1 for no reason

[m2yuout]

Yeah, cheers for that, car has been 100% this morning so im quite confused just gonna see how things pan out going forward, have ordered some plugs and filters cus its gotta be due a service anyhow.
Thanks for your advice so far guys, had a few people mention head gasket failure but cant see how this would affect cold situations, temperature is all okay atm