MY CAR SEEMS TO BE BACK FIRING AND IT IS DOWN ON...

  • Tiny
  • Anonymous
  • 1996 Mercedes Benz S420
  • 150,000 miles

My car seems to be back firing and it is down on power. The car starts up fine. Ive had it 2 and a half yrs and used mainly reg gas. It is also sticking in 1st and 2nd gear 40 mph and 60 mph especially going up hill.
could this be a cat problem or hopefully some thing else?

Sunday, November 18th, 2012 AT 4:15 AM

1 Answer

  • Tiny
  • mhpautos
  • Expert
  • 29,785 posts

Replace plugs and leads and do a comp test as well, start here.

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Sunday, November 18th, 2012 AT 9:23 AM

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