last week i had restrivcted performance and it went away after 10min of driving, ran fine.. now today at 5000 rpm on highway in 4th the little engine light came on.. seemed to be running ok. so i shut it off, restarted and is fine... wtf should i take this car to a dealer for a diognostics?? 1hr before this i added a little refrigerant to take the ac 40 on the gauge,was at 35 and not cold... now its better....any input welcomed

 

Read back through the threads, looking for similar titles etc / use Search
Plenty of similar, with fixes.
Plan to read the OBD codes and then Search here what they mean.
Check the FAQs.

 

Carloner, was it raining that day or day before? The Jags electrical system is particularly sensistive to moisture. As jagv8 suggests, search through the threads. You may find one discussing moisture affecting the throttle body.

 

yes it was raining the day before... last week the day after rain i got a restricted performance light that went off in about 5 min also, wtf???? this car is moody huh.

 

carloner, don't sweat it. Your Jag is fine. My 03 STR does the same during a rain or day after, especially more that it doesn't have the protective under-engine plastic panel to keep water away from some of the connectors.

 

jags are like women, Beautiful and moody! if you really want to check it out, go to Advance Auto Parts. they have a diagnostics computer that u plug into your car under the steering column. AND ITS FREE! lol