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1997 Pontiac Sunfire tune up

Tiny
UGLYPUGLY
  • MEMBER
  • 1997 PONTIAC SUNFIRE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
I just got a used 97 pontiac sunfire with 125,000 miles. It runs good, im just doing a tune up to get better gas mileage. Im putting new spark plugs, spark plug wires, and a new air fillter. My question is should I replace both o2 sensors with my tune up? There's no check engine light on, and it runs pretty good, or Should I only replace them when they go bad/check engine light comes on?
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Thursday, January 28th, 2010 AT 1:32 AM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Replacing your oxygen sensors is a part of regular vehicle maintenance. They should be replaced on a regular basis much like engine oil, drive belts etc. Also check your tire inflations, over or under inflation can lead to poor fuel mileage and unsafe driving conditions.
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Thursday, January 28th, 2010 AT 1:51 AM

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