98 ranger 2.5 loss of power......sometimes
Just bought it with 230k.its a 2.5 5 speed.i have replaced the plugs, wires, coil closest to fire wall, upper and lower intake gaskets.when i got it only one code for o2 running to lean.i also checked the timing belt and replaced it but while doing so i lined the crank gear dot to the notch and the 2 diamonds for the oil pump but on the cam i couldnt get the triangles perfect.before i started when in nutrual when i quickly hit the gas it would backfire(puff) from the tb.with the timing as close as i could get it(cam sprocket clockwise about 1mm past the mark it would still backfire out the tb so i changed the cam sprocket counter clock wise 1 tooth and the back fire went away.
I still have power loss every once and a while accelerating.if im in 5th and doing 60 and step on gas it takes for ever just to get to 70.
There are no enging lights on but when i take off and rev it high the engine light will come on till i shift.
Anyone have any ideas?