JEEP ENGINE NOT RUNNING

My Husband Is A Delivery Driver After Many Stops And Go's The Vehicle Won't Start. It Cranks But Won't Run. He Has To Wait...

I Overhauled This Car Replacing All Pistons With New Rings After Piston One From The Back Break Both Block And Sump. After The Overhaul...

Motor Cranks Over But No Fire Or Fuel Pump