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Ford Focus Mk1 1.6 Zetec Low Idle + Electrics Effect Idle Revs. Help???

jono2612
jono2612
in General Ford Related Discussions

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Hi Guys, I have 2 problems to which I hope here can help me sort and I hope this thread might help someone else.


I have a Ford Focus MK1 1.6 Zetec (engine pictured below). My problem No.1 is it idle's on the 700-750rpm line and kinda shakes the cabin more than it should, it feels wrong and sometimes hunts for idle.


Problem No.2 when i turn things like the light, blowers and front/back heated windscreen the revs drop to about 650 and shake the car considerable more to a point where you think it might stall but never does. Too be clear, my car does not have a MAF sensor.


I have changed:

- Idle valve sensore

- Throttle position sensor

- Coil Pack and leads


I have checked:

- PVC/breather valve hoses into the T and all is good

- All hoses involved in air intake for a potential vacuum leak. I also used carb cleaner to spray every area to see if revs increase with no luck.

- Battery/alternator connections wiggled and everything.

- Earth connections cleaned.


At the moment I can't find anything with anything but I did check battery voltage at Idle.

Voltage at idle - 14.3V

Voltage at idle with front electric windscreen heater on - 12.5V

Not sure if this is a problem as when I rev the car the voltage increases with the heaters/lights on from 12.5V plus past 14V, any one have a view on this? Could the culprit be all along the alternator?


Next actions - Apparently the PCV valve can cause this if broke, anyone have a view on this? Im also gonna do a ECU reset. Disconnect batt for 20 mins, let it idle for 20 mins then drive for 5 miles. I heard this works.

One last thing is Ford do a ECU update to sort this out people say, is this BULL????


One thing to add my exhaust does have a blow but i don't think this will cause any of the above.


If anyone has any ideas/experiences or tips please share I would be very appreciative.

Thanks


Jono


ADDED: Forgot to say my car says there are no fault codes stored.

  • Quote


    • Author

    UPDATE: The ECU reset did not cure the problem

    Method:

    Disconnected batt for 20 Mins

    Reconnected and idle for 20 mins

    5 Miles of mixed driving and going through the gears.

  • Quote

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