I've been getting weird idle again like it wanted to die on me and sometimes has .It would idle back and forth between 550 rpm and 900rpm. When I drive it and break the idles go too low to the point that my car wants to turn off unless I rev the engine. I replaced the fuel filter and cleaned the MAF. After doing that I would rev my engine and Everytime I did this the idle went from 900 to 700 or 600rpms. Idk if that solved the problem or if the problem is even fixed. But I would like some info on this idle issue. Also does the fuel filler neck and purge valve contribute to this problem? I have a 1997 land rover discovery series 1 4.0 v8

 

you got this posted in the wrong section but check you idle air control valve

 

I cleaned out my idle air control valve and bottle throttle and now instead of it being low it's high.

 

First off welcome aboard to the site. Go to forums, vehicle line up and then choose your vehicle model, discovery 1 for you