Going to try again. I just replaced the fuel pump in my Cherokee. It starts up fine and idols pretty good after a bit. If I try to accelerate it will spit, sputter, backfire and not accelerate. I have checked all vacuum lines, all good. Has new cap, rotor, plugs. If I unplug the crank position sensor, dies or no start. Unplug MAP sensor, ugly. Unplug the cam position sensor, no change. I have done the test the Hayne's has. I used a digital Volt meter on AC and got 0 volts. Should it be on AC?? Are these symptoms conducive to a bad cam position sensor. I really don't want to spend the $$$ just replacing sensors. Any and all help is greatly appreciated!!!