Cracked Head?

[mtopxsecret6]

Gday guys, I have a problem here, possibly more than what i first thought. This is the problem. In the mornings, the car will start fine, and run fine. But, after a while, once its warmed up etc.. it will start dropping cylinders. as if the fuel is not being burnt? i have checked the plugs, they are fine. I have checked the coilpacks, and the resistance seemed to come in at the correct ohms. But, it just seems to not want to work.. So thats why i ask what would be the symptoms of a cracked block? maybe its leaking water into the block causing non explosing? any ideas people?

Thanks for your help.

[Bazelinez]

Coil packs for sure.

Unplug each one whilst its running warm. When you find the pack that makes no difference to the way its running, you've found the dud.

If it were head/head gasket there would be steam out of the exhaust and oil in coolant/coolant in oil

I bet its the coil packs, one or more is stuffed its a common R32 problem.

[mtopxsecret6]

Ok, i will take a look at that, see what happens... so im assuming you mean, pull the plug of, and on again. Im pretty sure thats what your refering to. i will take a look at that. If it was pumping steam out the back end, would it be a white colour?

[Bazelinez]

Yeah that's what I mean, unplug and plug one at a time.

It will be white yes. You can also get an 02 tester. Mechanics have them. You stick them in the radiator inlet when you remove the cap and pump it a few times. If you have a stuffed head, the liquid inside turns to green from blue.

Takes about 10 seconds to check.