Jeep Repair: wont start no fuel and no spark, crank sensor, jeep grand cherekee

Question
QUESTION: I have a 1998 jeep grand cherekee, I believe I have a bad computer the fuel pump doesn't activate and the fuel gauge shows empty (It is not empty) there is no spark from coil the wire plug to coil on one wire there,s a ground and the other shows up to 5.81 volts. It won't start can u help?

ANSWER: 4.0 L engine?  Get a scanner and see if u can talk to the engine computer and any other computer on the network.I live in the Atlanta area if u would like I can look at this for you.

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QUESTION: yes it's a 4.0L  I have a scan tool that checks codes and erases them and it only comes up no link. I have only 5.81 volts going to the cam sensor (book says at least 8v and when I copnnect to the return it doesn't fluxuate between 1 and 5v also only roughly 5v going to coil. I've checked wires with ohm meter from comuter to coil and dist. all ok.

Answer
ok here is what u might have then  unplug the crank sensor  it is more then likely shorting out the computer. After the sensor is unplugged see if u can talk to the engine computer after that.  The info u got on the 8 volts is wrong  its a 5 volt system. If u can talk to the computer after the crank sensor is unplugged  then u need a crank sensor.