2004 Jeep Grand Cherokee "clean carbon plenum car" Questions

...may not be valid. Before condemming it though, make sure "business end" is clean and free of carbon or varnish. That applies to passage into plenum as well. If everything is clean then replace

...carbon cleaning / throttle-body cleaning. 3- Vacuum leaks at any of the hoses that connect to the Intake manifold; especially the MAP sensor connection. 4- If that does not help then the O2 sensor ...

...Carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms may vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel ...

carbon POT. (see spec on it for that.. facts) and is cheap. MISFIRING ( feel it , hear it, see it shake) sure.... lets work hot misfire (coolant at 180f hot, ECT shows that with scan tool is it) is it

...to its failure. Maybe you can luck out and only need to clean the carbon build-up from inside the unit. Hope this helps. I am always amazed at the drastic impact of just one of these sensors

...carbon build up? Use top engine cleaner and clean the air plenum. Once you have done this clear the codes and go for a ride. About 30 miles should do it. If you have anymore codes it will come ...

...carbon/oil deposits that are around the throttle plate. If the plate area is very dirty/black in color, you can use a toothbrush to help clean. When vehicle is started, it may run rough until all the ...

...clean & no carbon build-up. Energize fuel rail. With plenum off, reattach fuel line. Turn key to run. Watch for fuel leaking in back (fuel pressure regulator) or out nylon lines (fuel injectors). ...

clean all the carbon build up off the pistons and valves. Again do this for a few seconds. If you still have the stumble, then you have bad valve seats.Where the vavle sits on the head. To fix this is

...clean the plenum out where the carbon build up is and make sure air flows throughout. also blow air between the intake and the egr valve(remove the valve) and make sure there are no restrictions in ...