2000 GMC K3500 Sierra SLE 8 Cyl 7.4L
Engine Studders and Hesitates at low speeds
Engine studders while driving at idle speed. There is a small coolant leak in front left corner of manifold. Engine starts promptly when cold but after running awhile, hard to start.
Is this a diesel? If it is check fuel pressure. If it is gas start checking engine controls, map sensor, temps sensor crank sensor etc.