1999 Ford Explorer check engine code for air blowing thru d

Tiny
SEANSTRAUSITY
  • MEMBER
  • 1999 FORD EXPLORER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 186,400 MILES
Air conditioner blows cold, but blows thru the defroster vents up by the windshield & when I turn it on, it throws a code to "check engine". Code relates to the air conditioner.
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Friday, October 15th, 2010 AT 10:04 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
You are dealing with a vacuum leak in this case. The vent doors that direct air flow are vacuum actuated. Check under the dash for damaged or disconnected hoses. If you are lucky, you may hear a hissing sound with the engine running.

Let me know what you find.
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Friday, October 15th, 2010 AT 11:23 PM
Tiny
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  • MEMBER
Thanks bro i'll check it out.I already checked all the fuses. So i'll check for a vacuume leak, i'll let u know.
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Saturday, October 16th, 2010 AT 11:58 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Let me know. The vent doors won't set a check engine light.
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Saturday, October 16th, 2010 AT 10:19 PM
Tiny
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  • MEMBER
Ya, i've been told by several ppl its a vacume leak. The problem is there are manyl places that cud be leaking.I havent found any broken or disconnected spegettii hosses.
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Sunday, October 17th, 2010 AT 11:19 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
They are a pain in the & % to find. If you can stand the smell and can be really careful, take some starter fluid and spray it around the hoses. If there is a leak, it will cause the engine to rev-up. That is if the hose is still connected to the engine. However, please remember, keep the doors open for fresh air to you, and starting fluid is extremely flamable. Keep it away from anything that is extremely hot or could cause a spark.
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Sunday, October 17th, 2010 AT 11:56 AM
Tiny
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  • MEMBER
Hey thanks bro, i'll try it!
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Sunday, October 17th, 2010 AT 6:31 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
You're welcome. Just be careful and let me know if you find it.
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Sunday, October 17th, 2010 AT 8:58 PM

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