Over the weekend I was driving with my Fait 1100 I noticed low performance on the car especially on a stipy road usually it would climb with no gear change now it can't even go to 100km even when excelarated, I recently serviced and patched the exhaust as it was leaking what would be the problem now? And I noticed that the temp gauge remains high on a middle bar even when the car is running on a high speed and the engine is in taking the air gear 5/80km.please help