99 Cherokee 6 cyl. It ran fine until my wife left the door open all night and it was about 20 deg outside. I get in and try to start it and of course the battery is dead. I hook up a battery charger/starter to it and put it on the 70 Amp start setting. It cranks but doesn't start.
I first check for spark. Spark is good. The plugs have plenty of fuel on them and I can hear the pump come on. Compression is good. All of the fuses are OK. So why won't it start. I went ahead and put new plugs and wires on just for kicks. I have heard about the crank position sensor going bad but I thought it wouldn't spark at all if it was bad.
Any ideas or suggestions are appreciated. Thanks