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Erratic revs

437 views 1 reply 2 participants last post by  Automatic1 
#1 ·
hi my mondeo is acting very strange its a 57 plate 2.0 zetec petrol on startup the revs surge really high and then idles at 1000 but if I put my foot on the accelerator and release the revs climb on there own for about 3 seconds would any body no what the problem could be any help would be appreciated
 
#2 · (Edited by Moderator)
You need to first scan your can with FORSCAN or some OBD tools suitable for ford.

https://forscan.org/download.html

https://bafxpro.com/products/obdreader

It can be anything, starting with a bad/dirt throttle body, module and a hell lot more.

You first need to diagnose it using basic tools, just to see if there is any errors.

Now, once you will have these tools, you can also diagnose each module and every module behaviour with them as well.

To see if the sensor reacts fast enough, does the data makes sense? and a lot more.
 
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