Dodge Dakota, year 2000, 20k miles 4.7litre
Living is small town rural Alaska with no repair shops so hope you can help. The truck starts with a puff of black smoke and runs ok until it warms up then things go bad. Sounds rough and doesn't want to idle and will stop and not easy to restart. Black smoke continues from this point.
Either an injector is sticking or maybe the fuel pressure regulator (if equipped) is blown. Use a meter and test resistance across all the injectors, see if one is out of range from the others
April, 10, 2007 AT 8:18 AM
Black smoke usually means a rich conditions. I would think that the fuel pressure is too high or that you have a leaky injector/s. Test the pressure at the rail. Try running some injector cleaner thru a tank of fuel or two. I like chevron with techron myself.