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        General >> Problems >> Intermittent rough idle 24v
        
(Message started by: Kristian on Jun 1^st, 2012, 12:23am)

Title: Intermittent rough idle 24v
Post by Kristian on Jun 1^st, 2012, 12:23am

Hey all,

For about a year I have been experiencing occasional rough idle. Idle runs between 400-800 rpm and jerks the car when stopped at a light. When it is really bad I have to put the transmission in neutral. The car has about 116000 km on the odometer.

The problem only occurs once in a while (a couple of times one day and then nothing for a week) which leads me to think that it is not a problem with vacuum hoses or such. I have checked all the rubber hoses and they seem fine. Also, the car doesn't seem to lack power. It can happen with the engine cold or warm.

However, I did get a diagnostic reading that said the engine was running lean.

Could it be a bad sensor or sticky solenoid problem??
But then wouldn't the diagnostics tell me of any faulty sensor?

Thanks.

Title: Re: Intermittent rough idle 24v
Post by Simmo on Jun 1^st, 2012, 6:04am

Have a read of This (http://www.fordscorpio.co.uk/cleanmaf.htm). ;)

Title: Re: Intermittent rough idle 24v
Post by Matt on Jun 1^st, 2012, 8:59am

check the idle valve under the cover at the back of the engine to

Title: Re: Intermittent rough idle 24v
Post by Kristian on Jun 10^th, 2012, 8:45pm

** UPDATE **

I cleaned the MAF and also checked the IACV. The idle still runs rough sometimes. So no change.

When I remove the IACV when the engine is idling badly the problem seems to go away. So I will try to get a new IACV and see if this really is the problem.

Title: Re: Intermittent rough idle 24v
Post by Mike H on Jun 11^th, 2012, 12:28pm

Have we checked vacuum hoses yet? Even a weak joint or small crack can be difficult to spot on cursory inspection and there's a 'T' junction (or two) that is a known problem on the 24V. (?) (From what I've read here anyway ;D )

I only mention it as there was another topic recently about rough running as it was vacuum hoses IIRC.