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Mk1 Petrol Not Running Right


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#1 ralphrj

ralphrj

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  • Ford Model: Ford Focus Mk1 1.6 Zetec

Posted 08 October 2010 - 12:31 PM

I am trying to solve a problem with my Mk1 1.6 petrol Focus.

The engine is not running smoothly and feels down on power.

I know that it is not the coil pack as this failed and was replaced a few months back and the current problem is nowhere near as severe but still annoying.

If I disconnect the battery to reset the ECU the problem disappears for approximately 20-30 minutes before coming back. There are no warning lights illuminated on the dashboard.

I suspect it could be a faulty sensor that is giving an incorrect reading as the ECU "learns" resulting in an incorrect fuel/air mixture.

Any suggestions?

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#2 artscot79

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  • Name: arthur
  • Ford Model: focus mk2 ti-vct
  • Year: 2006
  • Location: Fife

Posted 08 October 2010 - 01:40 PM

I am trying to solve a problem with my Mk1 1.6 petrol Focus.

The engine is not running smoothly and feels down on power.

I know that it is not the coil pack as this failed and was replaced a few months back and the current problem is nowhere near as severe but still annoying.

If I disconnect the battery to reset the ECU the problem disappears for approximately 20-30 minutes before coming back. There are no warning lights illuminated on the dashboard.

I suspect it could be a faulty sensor that is giving an incorrect reading as the ECU "learns" resulting in an incorrect fuel/air mixture.

Any suggestions?


with these issues its best to take it to a garage who can read the live readings on a diagnostic so they can pinpoint the issue really it can be a split in a hose causing an air leak it cam be that the coil was replaced but the misfiring has damaged the cat a fauklty lead choked fuel filter to name a few it could be the exhaust o2 sensors really a diagnostic will save you money in the long run that way you only replace what is found to be faulty and not half a dozen parts in the hope one of them fixes it


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