1987 BUICK

  • Tiny
  • Dave87Gnx
  • 1987 Buick

Engine Performance problem
1987 Other Buick Models 6 cyl Two Wheel Drive Automatic 50000 miles

My Car When Its Cold It Runs Great, After It Reaches 160 Degree Temp, It Starts To Hesitate.

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Tuesday, November 18th, 2008 AT 7:09 PM

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  • Tiny
  • Docfixit
  • Expert
  • 18,991 posts

It is going into closed loop at that temp. This is when O2 startes adj. Fuel ratio a slow to respond O2 can cause hesitation. If you can find someone with a old OBDI scaner you can read component info. If O2 is got alot of miles on it a good place to start. Let me know and I'll try and get it running smooth.

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Saturday, November 22nd, 2008 AT 11:05 AM

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