Toyota Granvia - Abhorrent MPG - Where to start?

[radiodanno]

Seemingly at the right temperature. It gets up to temp VERY quickly and just stays there.

[cptsideways]

Iirc these thing can weigh about 2.3tons !! Thats about the same fuel economy as my Landcruiser.




I would have a look at adjusting the pump timing, its reletively easy to do by just loosing the pump body & injector pipes & you can always put it back where it was before. Difference can sometimes be amazing.

[Bill]

radiodanno said:

Overdrive kicks in at 56mph. It ticks away like a little sewing machine once it does that. It definitely works as if you flick the OD switch to off the engine starts revving at about 3.5k rather than 2k. (It's 3 speed plus OD)

Is it meant to be three speed? 2k rpm at 56 seems high so is it getting into top before the OD kicks in?

[scubadude]

I have a 2.4ltr non-turbo I4 Diesel Powervan which is usually driven empty, it is also a manual and being saintly I can get 30mpg, I cannot begin to imagine how anyone expects to get over 20 with a 3ltr auto.

FWIW, I saw a minor improvement after an oil & Filter change.

PS- Assume you have done/checked the differential anti-torque bush, removes the clunk on take off and power application, cheap of ebay and garage swapped mine for beer money.

Edited by scubadude on Wednesday 20th August 08:56

[radiodanno]

Bill said:

Is it meant to be three speed? 2k rpm at 56 seems high so is it getting into top before the OD kicks in?

it's 2000rpm at 60mph. All talk from the (excellent but very quiet) Granvia forum is that's spot on.

[Bill]

I've just checked mine and it's similar, but I get 25+ mpg despite the roof rack, off road tyres and 4x4. Are any of the wheels hot after a run?

[radiodanno]

Front wheels feel warm. Not hot. Warmer than the rears but not hot to the touch.

Aaagh!

[Leptons]

Try some 2 stroke in it? Definitely block the egr off.

Get the Injectors sonically cleaned?

[radiodanno]

It is quite smokey on boost for the first 5 minutes or so, so I've put in some two-stroke oil to see if that makes any difference. It's getting a mahoosive run over the weekend of about 300 miles so if it's no better after that it's off to Japex for them to give it a proper good look/kicking.

[vrooom]

WD-40 is more of a solvent rather than a lubricant. No wd-40 unless you want to dry out the part and have it fall apart.. You should use lithium grease on bushing.

[vrooom]

If you get lot of black smoke, then i guess it running bit too rich, which might explain your fuel usage.

[radiodanno]

It's only a bit sooty to start with. After 5 mins it seems pretty clear. Good tip though, I'll get them to checkitout.

[clearlyconfused]

Hi, did you manage to find a solution to this poor fuel economy problem? I have exactly the same car as yourself, (1995 Granvia, 3l Turbo diesel 1kzte 4wd kch10) identical mileage and all. Im about to pull the injector pump inlets apart to see what i can find. Id really appreciate any input

[BorniteIdentity]

God. Mine was a humiliating fail on my part.

I didn’t realise that when they chipped the speedo for MPH, it also made it count miles and not KMPH on the ODO! So actually it was doing 400 miles to a tank and not 400 kilometres.

Stupid fool.

Hope your issue is similarly simple to resolve!