I have been having issues with my rpms jumping around while driving and it is not the gauge becasue I can feel the motor give out. It feels like a cylinder missing but worse because the car will stall occasionaly now. It got to the point where the car would stall at 10 to 15 mph sporadically. I checked all of the plugs and wires and they looked fine, but I replaced the plugs anyway. Still have the same problem and today when driving it stalled when pullling up to a stop sign and then when I went to start back up there was a huge backfire and the issue still seems to be the same with rpms jumping down when driving. The car goes from cruising fine to a rough running mess. I'm thinking it may be timing related, but any input would help.