Hi guys i got the engine back in the van but it just turns over and doesent fire iv only had the right head off to replace push rod tubes. The engine ran and started before removal. There's fuel to the filter anyone got any ideas were to start and what to test its a 1600 type 1 engine no mods standard carb dizzy ect. I dident remove the the dizzy leads. I have replaced the plugs. Any help would be great.