general problems of the 2013 Toyota Tundra

It would crank but not start.

Hard to start just cranks usually starts after 3 tries I tried turning the key on and waiting a few seconds and then it fires up when driving has no power when accelerating.

Ecu problem. Since June 2018, I have started to see decreased mpg (avg 9 mpg, 50/50) and vehicle exhibiting high alc. Density % when fueled with e0/e10 gas. No dtc codes, but extended crank exhibited, poor performance and shifting observed. This is a flex vehicle. Fuel trims were way into negative and I have called Toyota and filed a case when this happened, but was out of warranty by 2 months. (called Aug 2018) vehicle had 55k miles. They said its up to the dealership to remedy the issue. Took it to the dealer and they re calibrated the ecu per Toyota TSB 0058-13 (so they know of the problem , but not doing anything about it) to me it looks like they are hiding something, (dieselgate) for a year, vehicle was fine and did not show any issues with alc. Density % , mpg was normal and performance/driveability improved, until Sep 2019. Same thing. Alc. Density % too high causing poor mpg. I have to pay the dealer too just reset the values, even though this issue falls under federal emission standards and it has warranty of 84 months or 80k. So even after the fix ecu changes the values after a year. Clearly ecu issue that Toyota does not want to take responsibility for. This goes against gas emissions (ghg) and fuel economy standards for light-duty vehicles. There are known issues about this out there on flex fuel Tundras, but Toyota is trying to hide this.

Toyota dealer and Toyota technical support are unable to fix the problem associated with t-sb-0058-13. This is the second time within 3 months or so that I have taken my 2013 Toyota Tundra in for this fix. Fuel economy drops on average of 30-40%. Toyota refuse to acknowledge that this is an issue, and is refusing to cover costs associated with fixing this recurring problem. This has been stated as a software gliche, and there are no parts to replace. Hard starts, rough idle, and reduction in fuel economy can only be fixed by reprogramming the ecm. Dealership is saying there is nothing that Toyota is willing to do. This issue is impacting thousands of owners, and the only resolution Toyota has is to flash the ecm. If this is a software issue I would expect that Toyota issue a recall to address this problem since it has been ongoing for multiple years of this engine combination. They know it's a problem, but are not doing anything to address it. I have logged multiple calls in to Toyota for this problem, but have received no follow up contacts.

Incredibly poor mileage due to defective flex fuel engine. I have a brand new 2013 Toyota Tundra crewmax 4x4 flex fuel that is epa rate for 13/17. I have been consistently averaging 7. 4 mpg city under very light throttle. Following a Toyota corporate esb I have already had the dealer reflash the ecu in an attempt to resolve this issue. The poor mileage remains.