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Really bad MPG following long time off the road


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Posted

The car was in for paint and other bits through the winter and spent about 5 months off power completely.

 

Now I can't seem to get more than 16mpg tops whereas 24 was more the average.

 

Do I need to do the pedal dance? Will that help to reset the ECU? NO other alterations to the car in this time, just cosmetic...!

Posted

How are you measuring the mpg? Actual maths following a fill up, or from the OBC?

 

No harm in disconnecting the battery for an hour to reset everything, then seeing what happens.

Posted

Definitely worth doing the pedal dance to reset ECU, reset throttle and learn again. If none of these helps, next step would be cleaning the intake system.

Posted

Definitely worth doing the pedal dance to reset ECU, reset throttle and learn again. If none of these helps, next step would be cleaning the intake system.

 

Is there any risk to doing this? I'm not gonna eff up my car if I get this wrong? I'm going to the Ring in 3 days and need her to be in top shape!

Posted

No way to mess anything up doing the pedal dances, I think Davey was referring to the cleaning of the intake system. That's not something I'd be attempting before a Euro trip, rather I'd be putting up with high fuel usage and sorting when I got back. Worst case it's running rich, but unlikely to be to the point of bore wash.

Posted

If you get the pedal dance wrong, literally nothing happens, because you've done it wrong :lol:

 

I'd make sure your air filter is nice and clean and maybe give it an oil change too.

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