MPG Down after major service and timing belt

[g4ryw4tson]

Hi,

Any ideas why my 1.9 dci 130 would drop about 10 mpg after major service / new timing belt at main dealer? Computer was showing about 46mpg before and since i got it back i am on about 35?

Nothing has changed including the 3/4 tank of derv car went in with. Although is does feel more responsive at lower revs than before?

I told them not to touch the ecu as it has been remapped.

Any thoughts?

Ta

Gary

[davelowe]

I told them not to touch the ecu as it has been remapped.

Gary I feel for you mate. This whole sorry business is a mess. You should get down to the place that did the work and raise merry hell. I would: you paid at least double the going rate (probably nearer four times) for a bog standard job. The software that calculates the price is a mask: they really are taking the michael. Alex has explained this in another post. That job can be done in two hours and the parts cost no more than £200 MAX. Personally I found it quite refreshing that you managed to get the timing belt kit for £98. That is a good price. The labour charges are ludicrous.

The ECU may or may not have been altered. The change in MPG might be due to the current weather conditions. I'm not sure how you would find out, other than to get an independent with a CLIP computer to have a look. I don't know whether there is a time stamp on any re-mapping.

[AlexB]

Gary,

Try the following: wait until the snow melts, warm up the engine, reset the odometer, drive a long distance.

The garage, probably, left the engine running for a while or did a road test, which caused the change in the average fuel consumption.

I also noticed more torque in low revs after replacing the belt. I did not touch the ECU and did not disconnect the battery in the process.