Hey Guys, First time poster. I have a 95 Across that i have been restoring and I'm scratching my head at the moment. It has 50PSI compression across all four cylinders, hot, cold, wet or dry the compression stays the same. It starts but obviously has no power and revs hang for a little bit before returning to idle Below is all the things i have changed/checked: New timing chain Valve clearances good (valves appear to seal with fuel not leaking past as a test) lapped intake and exhaust valves also de-carboned exhaust ports new standard sized piston rings honed bores (measured by professional and within in limits) pistons inspected within limits (measured by professional) new head gasket news o-rings on intake manifolds. The timing is spot on in relation to the service manual. I have vacuum/carby balancing gauges connect it and it indicates late valve timing. My current thinking is what if i advanced the inlet cam by one tooth and see if that improves compression? how close is the valves to pistons? Is there a a high risk of the two coming into contact with just a single tooth of difference? do i just do it to the inlet alone? advance both cams at the same time? someone also suggested to see if the head is warped, would this make all cylinders be at the 50psi mark? Can someone please help me look for something i haven't done yet? Do i push it out side and set it on fire or take it to a mechanic and have them sort it out?