liddelljohn Posted January 19, 2023 Share Posted January 19, 2023 My Hilux is now 4 years old 74,000 kms regularly toyota services , but fuel consumption is about 20% more than before on same mileage , Airfilters changed , Toyota service say there is nothing wrong they have checked injectors etc but I am refuelling more ften and can see the fuel consumption is worse ,, any ideas ,, Link to comment Share on other sites More sharing options...
Liverpool Lou Posted January 19, 2023 Share Posted January 19, 2023 Diesel or petrol? Are you using the exact same fuel as you were four years ago? Some of the cheaper gasohol/ethanol (?)-type fuels result in higher fuel consumption. Perhaps you just need a lighter right foot! 1 Link to comment Share on other sites More sharing options...
fredob43 Posted January 19, 2023 Share Posted January 19, 2023 My Fortuna 2.8lt is now coming up to 6 year old has done just over 60k KM. I'm getting on a run around 6.1 LT =100km. Aprox: 7LT around town. Used to use Premium Diesel now B7 both return the same figures. The 2.4lt engine will get a tad less KM=LT. Then again I don't live in BKK or any other tourist places or those figures would go out of the window. Oh I also don't have a big right foot. So that's the sort of figures you should be getting. Have you had a new Fuel filter. If it's getting dirty that might??? be the problem. For a few hundred BHT worth changing anyway. Best of luck. 1 Link to comment Share on other sites More sharing options...
Kwasaki Posted January 19, 2023 Share Posted January 19, 2023 Go to another Toyota's and ask for a computer analysis check. 1 Link to comment Share on other sites More sharing options...
worgeordie Posted January 19, 2023 Share Posted January 19, 2023 Do you have thick black smoke coming out the exhaust ,that could indicate burning too much diesel , check tyre pressure ,not correct could result in higher fuel use , but not 20 % , then check that your fuel tank does not have a leak ... regards Worgeordie Link to comment Share on other sites More sharing options...
NoDisplayName Posted January 19, 2023 Share Posted January 19, 2023 Buy an automotive code scanner - 400-600 baht on lazada. https://www.lazada.co.th/products/i160795565-s193850213.html 1 Link to comment Share on other sites More sharing options...
liddelljohn Posted January 20, 2023 Author Share Posted January 20, 2023 Its diesel always use best B7 , no black smoke at all , fuel filters changes yearly Toyata did a full scan and said no issues , no leaks and tyre pressure is the reccomended 31psi mostly fuel from PTT , we are averaging 2000kms a month used to fill up about 3 times now have to fill up 4 most months . Im puzzled . lovely vehicle was a replacement for old 1990 Isuzu TFR that hit 647,000kms when we sold it after 20 years , Its still in Use in khon Khen now , and has 730,000 kms , also not much smoke but its very primitive ,, Hilux revo is comfy fast and well equiped ,, all my other vehicles here are big bikes which is my preferred transport but GF uses Hilux for business Link to comment Share on other sites More sharing options...
HauptmannUK Posted January 20, 2023 Share Posted January 20, 2023 20% is quite an increase and unlikely to be due to low tyre pressures. Also I've never seen a clogged fuel filter cause an increase in fuel consumption. Firstly, is it an auto transmission? A transmission fault could lead to the transmission hanging on to lower gears - increasing overall consumption. I would also check for binding brakes.... Also check for a leaking injector or a fuel leak. Get the dealer to monitor fuel pressure and check the pressure measurements against Toyota data. This needs proper gauges and recording of pressure over time. Note that a leaky injector may not set a fault code and would not cause black smoke (unless severe). It might be better to go to a Diesel specialist rather than the Toyota dealer. 10 years ago we used to see a lot of leaky injectors on D4D engines at quite low miles in the UK - but to be fair not seen any in recent years other that at 100k+ miles. 1 Link to comment Share on other sites More sharing options...
fredob43 Posted January 21, 2023 Share Posted January 21, 2023 (edited) 11 hours ago, HauptmannUK said: 20% is quite an increase and unlikely to be due to low tyre pressures. Also I've never seen a clogged fuel filter cause an increase in fuel consumption. Firstly, is it an auto transmission? A transmission fault could lead to the transmission hanging on to lower gears - increasing overall consumption. I would also check for binding brakes.... Also check for a leaking injector or a fuel leak. Get the dealer to monitor fuel pressure and check the pressure measurements against Toyota data. This needs proper gauges and recording of pressure over time. Note that a leaky injector may not set a fault code and would not cause black smoke (unless severe). It might be better to go to a Diesel specialist rather than the Toyota dealer. 10 years ago we used to see a lot of leaky injectors on D4D engines at quite low miles in the UK - but to be fair not seen any in recent years other that at 100k+ miles. Why I suggested check the fuel filter, was a similar thing happened to a friend of mine with his newish Nissan pick up. He was getting bad fuel consumption and it turned out his filter was full of <deleted>. He change it and it went back to running normal. If you think about it, say your A.C filter is dirty you would have too turn up the fan to make it work at the same efficiency as a clean one. Logic say it could be the same with Fuel filter??? It's a quick cheap check anyway. Could of cause be many things. Edited January 21, 2023 by fredob43 1 Link to comment Share on other sites More sharing options...
Kwasaki Posted January 21, 2023 Share Posted January 21, 2023 13 hours ago, liddelljohn said: Toyata did a full scan and said no issues , no leaks Try another Toyota dealer the one you use has obviously missed something. 1 Link to comment Share on other sites More sharing options...
fredob43 Posted January 22, 2023 Share Posted January 22, 2023 On 1/21/2023 at 1:10 PM, Kwasaki said: Try another Toyota dealer the one you use has obviously missed something. The OP lives in Pattaya the Toyota dealer there is known for being at best not that great. Link to comment Share on other sites More sharing options...
Kwasaki Posted January 22, 2023 Share Posted January 22, 2023 12 minutes ago, fredob43 said: The OP lives in Pattaya the Toyota dealer there is known for being at best not that great. Couldn't get underneath my Vigo at the the time rattle knocking noise. So my experience with the Vigo i had was one dealer saying OK, went to another they said ok. Took it to Cockpit outlet and they showed me what the problem was, i just didn't understand how both Toyota dealerships missed the missing and loosen bolts on the rear axle suspension. 1 Link to comment Share on other sites More sharing options...
In the jungle Posted January 22, 2023 Share Posted January 22, 2023 So far as I can tell from the preceding posts you have not actually measured the fuel consumption. Your impression seems to be subjective. A first step would therefore be to measure fuel consumption and compare with what others with the same truck/engine are getting. That makes more sense to me than getting dealers to chase a problem that may be illusory. 1 Link to comment Share on other sites More sharing options...
DavisH Posted January 22, 2023 Share Posted January 22, 2023 On 1/20/2023 at 11:30 PM, liddelljohn said: Its diesel always use best B7 , no black smoke at all , fuel filters changes yearly Toyata did a full scan and said no issues , no leaks and tyre pressure is the reccomended 31psi mostly fuel from PTT , we are averaging 2000kms a month used to fill up about 3 times now have to fill up 4 most months . Im puzzled . lovely vehicle was a replacement for old 1990 Isuzu TFR that hit 647,000kms when we sold it after 20 years , Its still in Use in khon Khen now , and has 730,000 kms , also not much smoke but its very primitive ,, Hilux revo is comfy fast and well equiped ,, all my other vehicles here are big bikes which is my preferred transport but GF uses Hilux for business Has there been any change in performance? Do you often drive in the city or on long runs on the highway? Perhaps the dpf is starting to clog up a bit. The "best" b7 is "premium b7", but you don't need that for your car. I assume you are not using premium b7 though. You could try solething like HKS direct deposit remover, or somethign similar. I've seen some companies actually removing the dpf and cleaning it. But of course, there could be other reasons for poor consumption. What does the dealer say? Link to comment Share on other sites More sharing options...
Garry Posted January 22, 2023 Share Posted January 22, 2023 On 1/20/2023 at 11:30 PM, liddelljohn said: Its diesel always use best B7 , no black smoke at all , fuel filters changes yearly Toyata did a full scan and said no issues , no leaks and tyre pressure is the reccomended 31psi mostly fuel from PTT , we are averaging 2000kms a month used to fill up about 3 times now have to fill up 4 most months . Im puzzled . lovely vehicle was a replacement for old 1990 Isuzu TFR that hit 647,000kms when we sold it after 20 years , Its still in Use in khon Khen now , and has 730,000 kms , also not much smoke but its very primitive ,, Hilux revo is comfy fast and well equiped ,, all my other vehicles here are big bikes which is my preferred transport but GF uses Hilux for business Hi John, I know you mentioned regular servicing and I have a couple of initial simple checks you can do for yourself with minor tools without any need to disconnect the sensors from the wiring harness. Okay, have a look at the MAF sensor (in or near the airbox) for cleanliness (try not to touch the metal of the exposed sensor with your fingers or tools). Non residual circuit board cleaner is ideal for cleaning the sensor and 2-3 squirts is normally all you need to have it sparkling again (note: sometimes contamination is not always visible, which doesn't mean the sensor is clean). The other sensor to check is the MAP sensor on the inlet manifold to ensure it is not clogged. With EGR valves common these days, the inlet manifold can get a wet deposit buildup. You can clean the sensor orifice with the same circuit board spray (CRC is a good brand). With both sensors be careful not to nick or damage the sealing o-rings for an air-tight seal. Speaking of air-tight seals, check your EVRV Vacuum Regulator Valve Solenoid (this solenoid helps controls boost). I had a crack in one of the EVRV nipples that managed the turbocharger actuator which more than likely diminished response in the turbocharger. I have no doubts that this specific issue effected my fuel economy somewhat. I successfully repaired the EVRV even though I have a brand new one as a backup spare. The attached photos are part of a recent service I did on my SUV. I have plenty more to share if you're interested Regards, Garry Link to comment Share on other sites More sharing options...
liddelljohn Posted January 25, 2023 Author Share Posted January 25, 2023 Took it to Toyota rayong and the put the OBD scanner on and noticed something weird ,, The MAF sensor is wrong type for our model Revo its amuch older one ?? , then going into Toyota warranty service records data downloads it seems Toyota Pattaya changed it last year ?????? but I dont recall that at all , it went in for a basic service oil , and filters change and thats all and the bill was only 2870Baht and im certain MAF unit is a lot more money than that ,,, something fishy here ?? Why was it swopped ???? for a second hand or old wrong item ?? Rayong and I are getting on to Toyota Customer services as the vehicle needs the correct unit and I need to unravel what is going on ?? Someone at the Pattaya dealer is bent Link to comment Share on other sites More sharing options...
stubuzz Posted January 25, 2023 Share Posted January 25, 2023 (edited) Air flow 999bt Edited January 25, 2023 by stubuzz Link to comment Share on other sites More sharing options...
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