1992 Volvo 940 "clean carbon plenum car" Questions

...Clean the Plenum/Air Intake system. Has to be done on this car every three years or so. Carbon buildup gets in there and gunks it up. After cleaning it, it'll fire right up and run like a top. :-) ...

...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 ...

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 back up

...plenum and cleaned all the carbon buildup off of that and lubed it and squirt some WD40 down the throttle cable. It was real loose. Easy to pull with little resistance. it sounds like the spring for ...

...carbon build up, the sides and back of the plate should be clean if not get some throttle body/plate cleaner by CRC at your local parts house and use a rag and old tooth brush and follow instructions ...