1998 Ford Expedition expedition

1998 FORD EXPEDITION
330,000 MILES • 4.7L • V8 • 2WD • AUTOMATIC
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JESSIEGIRL08
  • MEMBER
  • 1 POST
When its in park it stays running but when in drive it dies out. It starts right back up but most the time it stalls or acts like its not going to go
Sep 8, 2015 at 7:02 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,209 POSTS
  • ASE Certified Mechanic
Check for engine vacuum leaks. The most common one is behind the throttle body. A 90 degree bend in the line dry rots and leaks. Not easy to find if you're not looking for it. If you find there are no leaks, check or replace the idle air control valve (IAC). The IAC is responsible for maintaining the engine's idle speed.
Sep 8, 2015 at 12:27 PM
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