Hey yall, I have a 97 ford F53 chasis motorhome with the 7.5 litre gas engine. Only has 35k miles on it and has always ran fine. Up until a couple months ago after sitting for 2 months engine would not crank. I've determined that the ignition is not firing and have replaced coil and ignition control module, but it still is not firing. Anybody got any good advice? Thanks in advance.