I have read a few threads on this issue, but I am not trying to replace the entire fuel and emissions system. My 4cyl, Standard TJ has erratic rpm's at a stop light and at times will stall. When I first start it up in the morning it goes from high to low while it warms up. Driving is great, but if I stop, it begins to do the same thing. I replaced the IAC a few days ago and while I drove the jeep up and down the road, it had more power and pick up. Then I turned it off for gas. It started to do it again. I have noticed that when I fluctuates the rpm's down, there is a clicking sound from the engine right before like if something is getting actuated. Any ideas?
