So my jeep was running a bit rough and I suspected the stock injectors needed upgrading. I since installed the 4 hole injectors, new fuel pump, new fuel filter, new fuel regulator, new cap & rotor, new spark plugs & wires. Only engine code is 12 because I disconnected the battery to weld a crack I found on the exhaust manifold. Injector seem to be clicking when I listed with mechanic stethoscope. I am stumped as to why this thing is not running well because compression test was between 167-179 psi on cylinders?