Here’s some tips that helped me successfully repair the restricted performance light in my jaguar. It was restricting my cars performance to about 2500 revs. Did plenty of research and this light is usually a vacuum issue. Try replacing your mass airflow sensor, air filter, and also replacing all of the gaskets in the upper and lower intake manifold, you’ll want to clean around these very good. Also don’t forget the two IMT gaskets on the back of the upper intake as well. I would also replace all your spark plugs and ignition coils while your in there. Be carful when disassembling not to snap any vacuum lines, also don’t overtighten the intake manifold bolts when reassembling just tighten enough for an airtight seal between the gaskets. Take your time with this repair and if you replace any tubing such as vacuum or fuel injector make sure it is the proper kind. Hope this helps as all this worked for my jag!

свернуть