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        General >> Give/Need advice to/from others >> High CO on slow idle **HELP**
        
(Message started by: Zombie on Jan 11^th, 2007, 11:11am)

Title: High CO on slow idle **HELP**
Post by Zombie on Jan 11^th, 2007, 11:11am

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?

Title: Re: High CO on slow idle **HELP**
Post by Dave on Jan 11^th, 2007, 2:28pm

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 :)

Title: Re: High CO on slow idle **HELP**
Post by Kjetil S on Jan 11^th, 2007, 3:27pm

The 12v doesn't have a MAF..

Title: Re: High CO on slow idle **HELP**
Post by Dave on Jan 11^th, 2007, 5:34pm

Doh! Forgot about that, thanks for pointing that out :-[ ;)

Title: Re: High CO on slow idle **HELP**
Post by Kjetil S on Jan 11^th, 2007, 5:50pm

no problem ;D

Title: Re: High CO on slow idle **HELP**
Post by Zombie on Jan 12^th, 2007, 11:14am

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.

Title: Re: High CO on slow idle **HELP**
Post by Dave on Jan 12^th, 2007, 3:48pm

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