Hi all,
Recently installed my parras and disconnected battery to be on the safe side.
After installing it back in i went for a drive, (i had to select wagon 3.5L, followed the manual) now im getting awful fuel eco (judging by what the computer says) I used to get between 10-11 on average and its jumped up to 15-16. Exact same driving and routes. Any idea how this could have been caused? could be fixed?

Thanks

John

Hi all,
Recently installed my parras and disconnected battery to be on the safe side.
After installing it back in i went for a drive, (i had to select wagon 3.5L, followed the manual) now im getting awful fuel eco (judging by what the computer says) I used to get between 10-11 on average and its jumped up to 15-16. Exact same driving and routes. Any idea how this could have been caused? could be fixed?

Thanks

John

Give it time and distance to get a more accurate average. My cars can give me an "average" from 9.5 to 16 L/100 km if I am selective as to when I record it.

I would suggest filling up the tank to the top, driving 100km, filling it up again and using the pump to confirm the computer is recording accurately.

Formula:
(KM traveled/100)*L filled will give you L/100km

Let the computer work it out over a full tank.

I believe some funny stuff goes on after a battery disconnect. For me, the car will seem to forget it's idle point, so I'll be driving along, put my foot on the clutch to pull up at the lights, and it'll stall. This happens for about the first 3-4 hours of driving, then it works itself out again and is fine. My advice would be run it for a few days, then reset the trip and see how you go.

Disconnecting the battery resets the ECU, which results in the loss of various "learned" settings such as the fuel trims. The quickest way to re-establish the idle setting is, after reconnecting the battery, let the engine idle for 12-15 minutes (if the engine is started cold, 6-8 minutes if the engine is started hot).