• Tiny
  • willy440
  • 1996 Ford Contour
  • 6 CYL
  • FWD
  • automatic
  • 127,000 miles

Car has the 2.5 V6 starts beauiful. Go about 4 miles and stalls when you let off the gas. Restarts good. Runs great when I unplug Mass Air flow sensor. Changed MAS 4 times, changed IAC, checked all vacumn lines, changed ATS Air Temp sensor. Cleaned out Throttle intake. ?
Could the Catalic converter heat up an the cause car to stall? But why does it run when I unplug the MAS. Checked electrical and get no codes or engine lite. Bulb is good, it comes on when car stalls. But get no code when I plug in the tester.

Do you
have the same problem?
Sunday, March 27th, 2011 AT 1:31 PM

1 Reply

  • Tiny
  • merlin2021
  • Expert
  • 17,587 posts

Could be an 02 sensor the fuel mixture is controlled by the maf until it warms up then the 02's come online. Use your scanner and look at volage to sensors. Upstream o2 should switch frequently while downstream shoul be fairly flat. Unplug sensor and pcm will use average values. Also clear kam by removing battety negativr cable for 5 minutes.

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Sunday, June 26th, 2011 AT 4:24 AM

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