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Ford Scorpio Forum« High CO on slow idle **HELP** »
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Zombie
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High CO on slow idle **HELP**
« on: Jan 11th, 2007, 11:11am »		 Quote Quote Modify Modify
My car is producing 4.607% CO on the natural idle test but is OK on fast idle.
 
It is a 2.9 12v 1996.
 
Can anyone advise what the most likely fault is?
 
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Dave
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Re: High CO on slow idle **HELP**
« Reply #1 on: Jan 11th, 2007, 2:28pm »		 Quote Quote Modify Modify
Can't be specific myself but I would check the following:
 
-check MAF is clean and wiring looks ok
-clean the spark plugs and check gap, replace if old
-change the oil if overdue as old oil can send emissions up
-check exhaust system for leaks
 
failing that:
-get obd scan to check exhaust sensors
 
Hope this helps  Smiley
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Kjetil S
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Re: High CO on slow idle **HELP**
« Reply #2 on: Jan 11th, 2007, 3:27pm »		 Quote Quote Modify Modify
The 12v doesn't have a MAF..
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Dave
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Re: High CO on slow idle **HELP**
« Reply #3 on: Jan 11th, 2007, 5:34pm »		 Quote Quote Modify Modify
Doh! Forgot about that, thanks for pointing that out  Embarassed Wink
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Kjetil S
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Re: High CO on slow idle **HELP**
« Reply #4 on: Jan 11th, 2007, 5:50pm »		 Quote Quote Modify Modify
no problem  Grin
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Zombie
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Re: High CO on slow idle **HELP**
« Reply #5 on: Jan 12th, 2007, 11:14am »		 Quote Quote Modify Modify
Because my Scorpio of one of the older ones, will I be able to use an OBD scanner on it?
 
I have seen several Emission gastesters on E-bay, I may buy one and try and sort the problem myself.  I can probably do the power steering gaiters too if I wait for some dry weather.
 
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Dave
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Re: High CO on slow idle **HELP**
« Reply #6 on: Jan 12th, 2007, 3:48pm »		 Quote Quote Modify Modify
Well you can read any fault codes but you need a Star scanner, available from places such as Halfords IIRC and fairly cheap.
 
Have a look at this:
 
http://www.fordscorpio.co.uk/star.htm
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