redhyper

I think you need to read my previous post as I mentioned they didn't sent me SC16HR11 spark plugs.

I bought the 'SC16HR11 spark plugs' from ACE parts ebay. They are arguing with me that they sent the correct ones and it's my fault. This is the ebay listing: https://www.ebay.co.uk/itm/352653600537

Hello. A bit of an update. I managed to clean the MAF sensor by watching youtube videos. It seemed to make a small difference in terms of engine performance. As for the spark plugs I bought the SC16HR11 ones and the bolt is a lot bigger than the NGK ones in the engine. I'm not sure if these are the right ones as my spark plug tool doesn't fit on it now. I pulled only one of the spark plugs out and despite me cleaning it this month it is covered in carbon and it has some oil on it. Although using a cloth to clean inside where the ignition coil sits no oil appears on the rag. The spark plugs I bought say 'IKH20TT 4704' on them.

Yes it's the 1NR FE engine. So should I buy new spark plugs? I'm not sure how much that will help with fuel economy. I've counted the miles I've done fueling up from low to max many times. I know how many miles I'm doing per tank and it's about what the gauge says if not less.. Air filter, oil was changed on service. There's know why I can check things that was suggested like MAF and throttle body as I only can do basic things on the car like change spark plugs. The car does actually have another problem that has become worse is that it makes creaking noises when steering is on full turn. I took it to a garage and they said it's nothing to be worried about. But It doesn't feel right.

Thanks for the replies. What I'm getting annoyed at is only getting 220 miles per tank and that seems to be getting lower and lower. The first time I checked one spark plug it did have oil on it. Then about month later I checked all of them and they had no oil on them. I've tried scanning for codes and found nothing. I know that the battery is not a start/stop one but it still looks newish. I've owned a bunch of hot hatches and they had better fuel economy than this car. There's got to be something wrong with it.

Hello first time posting but I'm been lurking on these forums for a while and found the users here to be knowledgeable and helpful. I've owned a Toyota yaris 2010 1.3 petrol since febuary and the MPG has been worse than my 1.8 yaris. I only get around 220 miles per tank of fuel. I drive around town and dual carridgeways where I do journeys that can last 30+ minutes there and back. The trip computer reads 38mpg when I'm just driving around town and goes into the 40s when driving in 6th gear for a while. The car was serviced two months ago, has four premium new tyres which increased the mpg a bit as it was worse before. I've reguarly checked tyre pressures, driven calmly, and taken it on longer journeys but nothing has helped and in fact the MPG is now getting worse. There are no leaks under the car or any I can see around the engine. I've checked the spark plugs and removed some carbon but look in good condition to me. The first time I get into the car it kinda struggles to start but is fine after that. The start/stop eco mode only works randomly. I don't have any aircon, radio etc on while driving. I bought this car for the £30 road tax, good mpg figures and 6th gear but it's been really disappointing. I feel like I'm going to have to sell it to buy a car that is better on fuel which this car is supposed to be. Can anyone help me out here and can give me an idea of what is causing the poor fuel economy. Many thanks.