2002 Ford Taurus Trouble Idleing

Tiny
ZZCRITTER
  • MEMBER
  • 2002 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 10,000 MILES
I have a 2002 Ford Taurus V6 DOHC. About a month ago it was running rough. Took it to a shop and they replaced the fuel pump. After it ran pretty good except a slight miss on startup but after 30 seconds it would be fine. Or if you drove it it ran fine. They could not totally fix it. It always came up on their computer misfire on startup. Then it would go away. They replaced the EGR valve and sensor. They tried a new coil. Nothing totally got rid of the hesitation at startup. It sat for probably a week. Now When I start it up it does not want to idle. I goes down low and jumps around. Even after I drive it when I come to a stop it does the same thing. Sometimes it will die. After 1000 RPM it is fine. Drives fine, accelerates fine. It has codes po171 and po174 lean bank 1 and 2. Also it has a pending code of p0113. Iat sensor 1 ckt high. Have read somewhere it could be a MAF. I don't want to spend the 100.00 if it could be something else. Any help would be appreciated. Thanks
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Wednesday, May 19th, 2010 AT 8:12 PM

8 Replies

Tiny
BMRFIXIT
  • EXPERT
Possible MAF sensor
most common is a vacuum leak
check PCV valve hose and suspect intake manifold gasket
a smoke test should verify
ask them to do a smoke test before spending the money on a sensor you may or may not need
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Wednesday, May 19th, 2010 AT 8:35 PM
Tiny
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Where is the pcv valve hose located at?
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Wednesday, May 19th, 2010 AT 8:46 PM
Tiny
BMRFIXIT
  • EXPERT
Check under throttle body on the DOHC engine
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Wednesday, May 19th, 2010 AT 9:04 PM
Tiny
ZZCRITTER
  • MEMBER
First of all I cannot find a pcv anywhere. Now it is throwing a code of p1151. Ho2s 2/1 insufficient switching lean mean. I suspect all these codes are related to one thing that is wrong. But can't seem to find the one thing.
Anyway I can get a picture of where the pcv is supposed to be at. This is the v6 DOHC.

Thanks
Chris
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Thursday, May 20th, 2010 AT 7:42 AM
Tiny
BMRFIXIT
  • EXPERT
Suspect a vacuum leak
that would trickier all them codes

a smoke test should reveal any vacuum leaks if any

check under the throttle body vacuum hoses
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Thursday, May 20th, 2010 AT 8:04 PM
Tiny
BMRFIXIT
  • EXPERT


http://www.2carpros.com/forum/automotive_pictures/99387_7005_thumbnail_15.jpg



http://www.2carpros.com/forum/automotive_pictures/99387_7830a_thumbnail_7.jpg



sohc
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Thursday, May 20th, 2010 AT 8:12 PM
Tiny
ZZCRITTER
  • MEMBER
What is a smoke test? How would I go about performing a smoke test? Is it hard to do. Can I do it myself or should I take it to a repair shop?

Thanks
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Thursday, May 20th, 2010 AT 9:58 PM
Tiny
BMRFIXIT
  • EXPERT
Its a test that is done at the shop
where they use a smoke machine to locate leaks
in your case they would use smoke to check for vacuum leak it should take about 1hr to do or less
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Thursday, May 20th, 2010 AT 10:09 PM

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