HESITATION

  • Tiny
  • 2guys
  • 1995 Ford Ranger
  • 327,000 miles

95 ranger 2.3. It has 327,000 miles on it so I know it has some wear, but in hot weather it hesitates something awful. When you take off it will choke down and several seconds later start to pick up speed more like it should. It is sick in hot weather and always has been. I have replaced the coolant temp sensor and air filter and MAF sensor and IAT sensor and DPFE sensor none have helped. Once in a great while it will sound like a small backfire through the intake when you stomp the gas or downgear real hard. When the weather cools off, it runs fine again. At night I can climb a hill in 5th gear better than in 4th in the hot sun. What could cause this?

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Wednesday, May 30th, 2012 AT 10:08 PM

3 Replies

  • Tiny
  • hmac300
  • Expert
  • 43,721 posts

Scan for codes, check fuel pressure it should show something. And if you haven't done it replacethe fuel filter or if your pressure is low, replace the fuel pump and filter.

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Wednesday, May 30th, 2012 AT 10:13 PM
  • Tiny
  • 2guys
  • Member

No codes have recently replaced fuel pump and filter. Mechanic told me it had plenty of fuel pressure. It has done this for years now.

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Wednesday, May 30th, 2012 AT 11:56 PM
  • Tiny
  • hmac300
  • Expert
  • 43,721 posts

Check vacuum at idle if 15" or below suspect a bad/plugged converter.

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Thursday, May 31st, 2012 AT 1:10 PM

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