I have a '00 XJR and it bogs down when i brake. It runs fine when i get on it and runs like a champ all the time. The problem only persists when i brakeand am almost at a complete stop.Also have another problem, i don't know if the two problems are related but i was driving the other night and all the sudden got a restricted peformance light. It won't let me go over 3000 rpm's when this happens. Cranked it up the next day and still had the restricted performance on it. After i drove it around for a while the restricted performance code wore off but i still have the amber light on the far left cluster (its a picture of an engine, i guess its engine check light) anyone know what my problems could be?

 

The code cleared on its own.