Ok I can't figure this one out and need a little help. I have a 85 CJ7 with a 258. The jeep has only 51K on it and is mostly stock. I recently put a new Weber 32/36 carb on it and a new fuel filter and pressure regulator (set at 4.5psi). I also replaced all of the vacuum lines. Here is the problem. Sometimes it fires right up, no problems, hesitation or anything. Other times it cranks over for 10-15 seconds before it fires. Either way when it's started it runs great, no misses, idles like dream, no stalling on take off etc. I think I am going to start with a new fuel pump (Carter P4070 with no regulator), any other ideas?