VR6 Fuel Economy

[ryana89]

it sits there hunting if the indicator is on

That's sound like a dodgy earthing point.

[mb1907953]

Only intermittent... Where would the dodgy earthing point be though? Only indicators. flashing the high beams doesnt do anything.

[gldgti]

Hmmm that is quite confusing considering I'm only get 290-300. How do you know you have a vacuum leak btw?? My idle is smooth 90% of the time but every now and then it sits there hunting if the indicator is on. Must be a dodgy regulator in the altenator but surely that wouldnt cause such a massive decrease in economy? Or should I be looking into it? Where is the o2 sensor on these? Might pull mine out and check it.

sounds like yours is running open loop for some reason (essentially warm up cycle). I would be looking into MAF, O2 sensor and coolant temp senders to make sure that the car is actually running in closed loop mode after warmup.

A well groomed VR should be able to get 10-11l/100km I reckon.

[mb1907953]

Will give it a punt mate. Much appreciated. It does have extractors so would that effect the o2 sensor at all? Is there a way I can test the MAF at all? The car idles at about 900 rpm I think. Is that right or should it be more like 800rpm? Anyway, will be looking into it all. Oil runs a little hot at 100-110 but I just assumed that was typical VR6. Maybe indicative of the open loop issue?

[The_Hawk]

15.1L/ 100km

Short trips, cold engine, stop start and I'm sure listening to that glorious noise = bad fuel consumption. Mine could easily get that high if I ONLY drove to and from the train station at full noise

[Dubba]

Sorry if this seems a bit off topic but am I the only one who feels that my vr6 runs a bit rough when it's low on petrol???!!??

[stefcio007]

I average 13.11L/100km at the moment (fill up to full, odometer record method)
Only do short trips (some hills) with only once a week long trip.
Best fuel economy is achieved for me when doing 80km/h (according to MFA).
Edit; 4sp auto figures

[HaydEn]

Good bump

[mb1907953]

Good bump indeed! Just an update from the new owner of my vr6 - Took it down to Sydney and got the MAF down to 6.5 on the way down... Just goes to show how much of an effect a lead foot, short runs and hills can have on the fuel economy. I used to average about 12/13 per 100ks doing short trips to uni etc.

That was despite all my efforts to improve economy like a new o2 sensor, temp sensors etc etc.

[VR28LT]

Just did the Brisbane to Sydney trip bringing home my latest vr6 and i had her at 8.2l\100km which i thought wasnt too bad considering we were traveling at some very decent speeds