Engine Performance problem
1999 Dodge Dakota 4 cyl Two Wheel Drive Manual 100000 miles
I have an intermentental power loss from crank sensor and coil. A jerking happens at half throttle. Have replaced alt, coil, crank sensor, cap and rotor, added two ground straps from block to frame and block to body. All have been replaced multiple times with no change. Plugs and wires have all been replaced with no change. Plugs get gradually dark brown towards the fire wall after 20,000 miles and increase of power is noticeable. Swapped out motor a year ago, this started happening shortly afterward.
Almost out of ideas, changing the distributor tomorrow.
Thanks for any suggestions.