car is spitting and sputtering after changing the spark plugs

1999 MERCURY COUGAR
209,909 MILES • 2.5L • V6
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PATTY73
  • MEMBER
  • 1 POST
spits and sputters. wont accelerate and back fires.
Nov 11, 2014 at 11:25 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
scan for codes and check fuel pressure with a gauge first auto parts rent it. also check for a vacuum leak
Nov 12, 2014 at 6:39 AM
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