Ok so long sorry short, car was running like it had a dead hole, did a compression test and found that #2 was at 65psi, I suspected it had a burnt valve or similar issue, removed cyl head last night and found a burnt exhaust valve in cyl #2. So I then completely disassembled the head and pulled all the valves and also found #1 exhaust valve was also on it's way out. Once I inspected the guides I found #1 And 2 exhaust guides wear serverly worn (more so #2), they are worn so much that the area around the valve seat ( in the combustion chamber ) is hammered from the valve walking around. Also I noticed that the exhaust guides on 3 and 4 are also worn but only slightly. So my question is what would cause the guide the wear so quickly and so badly?
Car Specs: 89 2.5L fully built. Head: fully ported 44mm int 37mm exh valves, F4 Fwd cam, high RPM springs and lifters. head was fully rebuilt last year with new steel guides, valve seats (FWD) and has about 5000-6000km's on it
EDIT: Oh and all the intake valves, seats and guides are in excellent shape.