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Member Since 28 Jul 2009
Offline Last Active Sep 18 2011 08:49 PM

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Engine hesitating on 06 Focus

29 July 2009 - 07:57 PM

My 06 reg Focus 1.6 Zetec petrol has an intermittent fault which is getting worse and driving me mad!

When being driven at steady speed, usually between 2 & 3000rpm, i feel a slight hesitance from the engine which feels like a misfire but I'm not sure that's what it is.

Under aceleration either gentle or hard the car performs perfectly, the hesitance is only when running on steady throttle.
I have done the dashboard computer test but no DTC codes are logged and i have also had it hooked up to a diagnostic rig but again no fault codes are evident.

The problem only occurs when the engine is at working temp and sometimes when the fault has been evident the car will idle roughly, but only for a couple of seconds at a time. Again, following the rough idling the car will drive away perfectly normally.

I appreciate that without fault codes this kind of thing is hard to pin down but i would welcome anyones ideas on this.

I am keen to avoid the 'change this sensor, change that sensor' scenario as i could spend a lot of cash before solving the problem and accept that i may have to simply wait for it to get worse to the point that the problem becomes more obvious.

Anyway, anyones advise or suggestions would be appreciated.