Zetec MAF sensor Dependance
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Zetec MAF sensor Dependance
Legal Disclaimer:
Davespages.co.uk will not accept liability for any loss or damage caused by deviation from the manufacturers configuration. The content below is gathered from my own investigation and must be used as a GUIDE ONLY , I cannot guarantee it accuracy.
Only today on a rolling road did a mate realise his MAF sensor was dead and the graph below shows the influence a dead one can have on the bhp/torque of a zetec engine.
In the black lines is the Torque and BHP with the dead MAF sensor connected.
In the Red Lines is the re-run with the dead MAF sensor disconnected.
(Note, even better power would have been achieved if a functioning MAF sensor had been connected for the re-run)
![Zetec MAF sensor Dependance 85rob03](https://2img.net/h/www.davespages.co.uk/forum/Balmuir/85rob03.jpg)
I noticed this as a member had this problem some months ago and the car was very sluggish at 4-6k and power would pick up again after 6k which is wrong for a 1.8 zetec. Once the MAF was unplugged, everything changed![Wink](https://2img.net/i/fa/i/smiles/icon_wink.gif)
So during a rolling road, another member came across this problem and its been identified quickly!
P.S - CO emmisions were less than 0.5% for the whole run... then after the maf was disconnected, we easily saw 4% CO emmisions.
This might be usefull for a sticky!
Dave
Davespages.co.uk will not accept liability for any loss or damage caused by deviation from the manufacturers configuration. The content below is gathered from my own investigation and must be used as a GUIDE ONLY , I cannot guarantee it accuracy.
Only today on a rolling road did a mate realise his MAF sensor was dead and the graph below shows the influence a dead one can have on the bhp/torque of a zetec engine.
In the black lines is the Torque and BHP with the dead MAF sensor connected.
In the Red Lines is the re-run with the dead MAF sensor disconnected.
(Note, even better power would have been achieved if a functioning MAF sensor had been connected for the re-run)
![Zetec MAF sensor Dependance 85rob03](https://2img.net/h/www.davespages.co.uk/forum/Balmuir/85rob03.jpg)
I noticed this as a member had this problem some months ago and the car was very sluggish at 4-6k and power would pick up again after 6k which is wrong for a 1.8 zetec. Once the MAF was unplugged, everything changed
![Wink](https://2img.net/i/fa/i/smiles/icon_wink.gif)
So during a rolling road, another member came across this problem and its been identified quickly!
P.S - CO emmisions were less than 0.5% for the whole run... then after the maf was disconnected, we easily saw 4% CO emmisions.
This might be usefull for a sticky!
Dave
![-](https://2img.net/i/empty.gif)
» Zetec ECU Pin-Outs
» 2.0 Zetec Preparation
» Changing Zetec Camshafts
» Zetec Camshaft Identification
» Zetec Compression Ratio Calculations
» 2.0 Zetec Preparation
» Changing Zetec Camshafts
» Zetec Camshaft Identification
» Zetec Compression Ratio Calculations
www.davespages.co.uk :: Hobbies and Intrests :: Cars :: Ford :: Zetec
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