The # 4 cylinder on my 78 is not firing at idle. I have checked the plugs, wires, changed the injector, checked the valve lash, and the electrinic fuel injector connector and everything checks out fine. I changed the fuel injector plugs about a month ago and was running great until 3 days ago. would it make a differance if the wires were crossed on the injector plugs? I do have lower compression in that cylinder, but the miss came rather suddenly. Once the car gaines momentum it seems to run o.k.