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Discussion Starter · #1 ·
Hi
This problem has only started since I had a new clutch fitted. The computer dash display has all ways been good but to day I noticed my average mpg display is jumping from 40 to 75 in a matter off seconds. Any one know what could cause this. The only thing I had done to the car was a new clutch and flywheef fitted a couple of days ago, could this cause and issue. Thanks in advance
 

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Grand Scenic 1.6 2007
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6,096 Posts
Hi Ian and Welcome:)
Sounds like some wires or sensors were disturbed and not put back properly. It happens too often and I would go back to them and tell them they left something adrift. It won't be their first time.
The usual suspects would be the earth cable from the battery, the ABS sensor on the gearbox side and on non ABS cars a speed sensor on the gearbox perhaps?
What car and engine is it?
 

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Discussion Starter · #4 ·
Also noticed the fuel used display is not going up after a journey. Is it possible that all the readings may be wrong or giving a false reading,
 

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Grand Scenic 1.6 2007
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6,096 Posts
Anything is possible but it's more probable that recent major work caused the problem.
 
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