I acquired a m4030DT with i believe the s2602 motor in non running condition. New battery, pulled the valve cover and all rockers move freely, loosened injection lines at injectors and i am getting fuel, took exhaust loose at manifold and I have gray smoke while cranking it over. Will not fire at all, even tried a shot of ether and still won't fire. Is it out of time? I don't think i would have smoke coming out the exhaust if it was a compression problem. If it is a timing issue, how do I check timing on this engine? Thank you