Hi.... I have an E150 1922 302 EFI 5,0 V8. It seems for me that the timing changes a bit and is wrong for some time and then go back and be OK for some time. (timing ping be heared. Have adjusted timing to 10B with spout connector off.) Anyone know what could possibly cause this? Is there any gear in the bottom of the distributer which can be loosen? Can it be cloggy gas injectores?
115000. miles. Regards, Tor....