I have a 1993 Mazda B2600, pickup idles rough (almost dies at idle after warms up) if I unplug the front plug from the spark plug it idles a lot smoother, has new spark plugs, wires and rotor cap.
Any help greatly appreciated
ok I own 2 b2600 and 2 mazda b2200,s the two issues that plague the 2600 are rust in the ecm its located down by the kicker plate on the passanger side most times its bad ground problem make sure were you bolt onto the truck are free of rust also may be inside the ecm.the second problem I found is is temp sending unit.there two sending units near the thremost a 2 pin that's the one your looking for the single pin is for you dash gage.use a volt meter turn your volt meter to volt setting. with the key turned on pull the wire from the 2 pin it shud not read more than 5 volts if its over replace sending unit. any one of these shud fix your problem