Kazlok

Hey guys,

Fairly recently I fixed a revving problem which I posted about on here and got some good suggestions! (http://www.fordowner...em/#entry197217)

Now my car seems to be randomly having issues with the engine stuttering, it seems to randomly come and go so recreating the conditions is quite difficult.

Usually it starts when I take off in First gear and it feels like it's going to stall or its choking on something which makes acceleration difficult, second gear it's still quite violent shudders but can usually get me up-to speed, from third and fourth gear the shudders are far less noticeable.

The odd thing is once I'm up-to speed, or if I accelerate very slowly, the car seems to behave fine! It seems to be ok in neutral, however, when I was waiting outside work the other day it was having little 'hiccups'.

As i said sometimes its fine, and the car will behave normally, which makes me think there could be a blockage somewhere?

Someone from work suggested that there is something blocking a filter which is attached to the carburettor? (Apparently this filter isn't even mentioned in the haynes manual)

Something I've noticed is that there seems to be less power when its playing up and that there may be a ticking noise coming from the engine? This may just me being paranoid though lol..

Any-ways I thought I would post on here to see if anyone else has had a similar problem or knows of a fix

Cheers

Hey guys!

I've had an issue with my Fiesta (1.25 Zetec) not passing its M.O.T. due to it not being able to partake in the Emissions test, reason being, the revving is completely unstable.

It's had this problem since I can remember and only now have I had an issue with the M.O.T.

In short the problem is like so.

• While idle the car revs around 1k-1.2k
• Upon depressing the throttle the engine revs quickly up-to around 3k then up-to 4k. If during this the throttle is disengaged the engine keeps revving as if I am tapping the throttle, even though I am doing nothing. (Occasionally it resets to idle but putting it into gear and finding the bite quickly restores it)
• During a gear change the engine occasionally over-revs

During the emissions test they need to keep the engine around 2.5k-3k revs for a sustained period of time, but unfortunately it cannot be kept stable.

Things we have tried are :-

• Cleaning/Changing the IAC (Idle Air-control valve)
  
• Cleaning/Changing the TPS (Throttle Position Sensor)
  
• Checked the vacuum pipes
  
• Removed the ECU fuses for 10 mins, then plugged back in
  
• Disconnected battery for 30 mins, idled for 10 mins, drove for 10 miles

Starting to run out of ideas now as to what could be causing the problem, something else that can apparently do it is a sensor related to or nearby the power steering column ( I can't remember the exact one, it's been a long day haha)

Just wondered if anyone else has had this problem and had an idea as to what could be causing it, apparently it's quite common and can be lots of little things..