I changed the spark plugs the other day, and now my truck is having problems starting. It does start, but immediately cuts out, then the idle crawls up to normal for about 5 seconds, then all is normal. I used Champion RN11YC4 plugs, made sure they were gapped and torqued correctly. Ignition wires are Magnacore 8mm leads that are about 2 years old, Ive checked to make sure theyre fully seated on the plugs. Any idea what could be causing the problem, I'm at a loss?