2002 Mercury Mountaineer no start when warm.

Tiny
THOMASMADIE
  • MEMBER
  • 2002 MERCURY MOUNTAINEER
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 103,000 MILES
Problem is, after you drive vehicle for about 2 hrs. It wont start, it will only crank over. Until you let vehicle sit for about 45 mins, then it will start and run fine? Has happened twice now. Only engine code is Po401 EGR unefficent flow? What would cause this.
Saturday, March 6th, 2010 AT 9:13 AM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Yep! Pull the egr off, clean the port under it all the way to the throttle plate, I use a length of steel coathanger. Put it all back together, reset the codes, if light comes on again, replace the EGR position sensor, thats the one the two small hoses from the exhaust plug into!
If EGR is stuck open during that period of no start, it can stop the engine from starting.
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Saturday, March 6th, 2010 AT 5:38 PM

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