No start ie. No spark and low compression two cylinders and others are running very very high fuel pressure

Ok head gasket blew been replaced all good until I tried to start and ckp sensor threw code 0336 wires good grounds good replaced sensor and code went away.


Now the shop its at says its intermittent firing at best and will not crank

Shop says plugs are shot and needs new ones but im thinking he said also that the fuel pressure? Was supposed to be like 3 but its like 80 in two of the cylinders and two other cylinders arent moving as should be (he said they had low pressure).

Any ideas as to what is going on?