are you sure about that? ........ yap...... it's about right....
mine is auto, always get 300 - 340....... maybe I am bit nutty....
P.S. call AA or RAC, tell them you warning light came on or felt lost half of the power, they will check the error code on their laptop and give you are report if there is anything wrong with it.
BTW, clean your AMS is a good idea too.....
I never managed to get my IS200LE down to 16mpg although it was a manual, so unless you drive very fast or aggressively (I live nearby and there isn't a lot of chance of that) or spend most of your time in crawling traffic; that isn't reasonable. I get about 23-24 from my 5 litre ISF!
Recheck by filling to the brim, making a note of the Odometer reading. When fuel is getting low, fill it to the brim again preferably at the same pump so the car is tilting the same amount, making a note of exactly how many litres it took and the new odometer reading to get the miles driven. Then recalculate mpg, remembering to divide the litres by 4.544 to get gallons. If you have the wrong size tyres/wheels on it can ruin the calculation. This isn't 100% accurate but it is the best you can do without going to a lot of trouble. The official figures are 21 mpg Urban & 28 mpg Combined and you should get a bit nearer that.
To be honest lately iv been driving like an old biddy lol and as you know yourself camberley/sandhurst isnt exactly the greatest roads to get any kind of speed up the wheels and tyres are the ones from standard 17 inch wheels and tyres and iv checked the tyre pressures which are what were in the book so they are all fine so i really dont know what else it could be ,the only other thing is its idling a bit high at around the 1500-2000 mark.The other week i had to go to london and put in 30 quid of petrol and mostly motorway driving i got about 110 miles if i remember right.Im really stumped but it really is seeming like i have to sell it.
Im bloody jelous that you have an isf and you even get more mpg than me lol now doubly jelous lol.
cheers
try re-setting the ecu
How can i clean the ams and what would i use ?If i reset the ecu how would i go about this and would i have to reprogramme the key ?How do i check if the throttle cable is adjusted properly?Im guessing when i take the air filter out il see something sitting in a hole inside the actual box itself?Is there anyway to check what the lambda is running ?The temperature gauge on the dash reads normal and goes up normally with no drama's so i dont think that could be it or is that soemthing completely different?Sorry for all the questions but im pretty new to lexus.