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1999 Ford Falcon Runs bad

Tiny
DREAMER1985
  • MEMBER
  • 1999 FORD FALCON
1999 Ford Falcon 6 cyl Two Wheel Drive Automatic

I have an XH falcon ute with a very rough idle at start up and once warmed up. (Almost sounds as though it will stall)
Have had it to a few mechanics who can not diagnose the problem.
The injectors have been tested and fine, also the fuel pressure regulator, leads, plugs, coil an TPS sensor. It sounds like an oxygen sensor problem but it has been replaced also, but yet when it is unplugged the car will run better?
i have put extractors on would this maybe cause some problem?
its been an on going problem gettin worse and worse.
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Wednesday, January 27th, 2010 AT 9:43 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
But yet when it is unplugged the car will run better?

What is it when its disconnected it runs better?
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Thursday, January 28th, 2010 AT 4:21 AM
Tiny
DREAMER1985
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  • 2 POSTS
When I unplug the oxygen sensor it seems to run smoother but it has been replaced.
Apparently the signal from the oxygen sensor is very erratic
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Thursday, January 28th, 2010 AT 4:30 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the wiring for short and open if okay think computer-you sure you have the correct 02 sensor/s?
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Thursday, January 28th, 2010 AT 5:24 AM

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