I recently bought a 1996 Jaguar XJ6with 90,000 miles. The car idles rough sometimes and looses power uphill. I have replaced all the O2 censors and the exhaust was taken off and repaired. The code states random multiple misfire in bank B. I need a more specific place to start these repairs are bankrupting me. I would like to fix this beautiful car for my son. I could use your help, I will donate 2 hours of labor promptly thank you, Billy