my jeep continues to stall every so often....parts replaced....temp sensor...throttle position sensor...crank sensor...coil...plugs...wires...fuel pump...fuel filter...map sensor..manifold air temp sensor...pcm....crank sensor three times...fuel pump twice...some times it starts back up..some times it takes a few to start...any help would be greatly appreciated ...I have a handicapped son and my 2 year old grandson and this is our only tramsportation