2.5 4 cylinder engine
"I have a 1998 dodge dakota 4 cylinder 5 speed. The engine is new with 40 miles on it. The head is totally rebuilt new valves, guides, springs etc., new pistons, new cam, lifters, pushrods, rocker arms, new injectors, new crank sensor, new distributor, new cap, new rotor button, new plug wires, new ignition coil, new timing chain, new timing chain tensioner, This engine is new except for the crank and rods... This engine still does not have any more power then it had before it was rebuilt? I'm lucky if I get 15 miles a gallon! It still cuts out or kinda of like a surge or something when you give it gas to get going? The check engine light works but it is not on! Any ideas what the problem could be? Could it be the oxygen sensors or what?