I have a 93 Jeep grand Cherokee, I-6 engine, it has a very hard time starting, esp. when cold. The starter turns and sounds normal. Once started which can take some time, and several attemps, it idles low and alomst stalls out, until warm. She has hit almost 150K miles but runs pretty well otherwise. I recently had a tune-up, new plugs, wires, distrib. cap, coil, fuel filter, complete oil change etc. Recently I've noticed if I leave the car on, but do not try to start it, after 30 secs to a minute, I hear a repeated clicking from the front Right part of the engine, and then the Fuel pump "humm" after this it starts up almost fine. still a little slow but no stress on the starter or engine. Any ideas to bring it back to a normal start eould be great, thanks for any and all help.