Hi All,

I just had the timing chain and exhaust replaced as well as a tuneup on my 1988 420 SEL. The mechanic is having a hard time getting the car to run well. When the accelerator is depressed the car barely goes. It seems as though the harder the pedal is pressed the slower the car goes. The car sat for years and was running poorly when I brought it in. I had been told that the catalytic converter was clogged. The car runs worse than when it was brought in but it idles well now. Your help would be greatly appreciated.