I was wondering if you guys could help with an issue I am having with my 1997 4 cylinder wrangler. When the truck is cold, it takes a long crank to start, unless I turn the key a few times before starting it, which is making me think a fuel pressure regulator. Once it is started it intermittently sputters, does not do this all the time, but it does hesitate on acceleration all the time unless it is at normal temperature. Sometimes when I step on the gas the vehicle does not go anywhere it just backfires, let go of the gas and wait a couple seconds and it goes. Just replaced the tps, iac and ignition coil, cap and rotor are fairly new and so are the plugs. No check engine light or codes stored. Thanks in advance for any input.