Oxidation/rust of engine parts in 2017 Yaris

[tmontague]

normal, due to the digital nature of the gauge it can appear to read slightly high right after a almost but not full fill up, only to then drop a bar on the gauge shortly after.

What wasn't normal was the pump shutting off before you were actually full. This happens sometimes are various pumps depending on various things especially full fill rate. I have had this happen to me a few times but I know it should take more so I keep filling it and it eventually shuts off when it should.

Just be careful doing this on a new to you car where you're unfamiliar with the tank capacity and its characteristics. if you overfill a tank it can damage the charcoal canister and lead to the premature stopping every time you try and fill the car with fuel.

[jowii]

Originally Posted by tmontague

normal, due to the digital nature of the gauge it can appear to read slightly high right after a almost but not full fill up, only to then drop a bar on the gauge shortly after.

What wasn't normal was the pump shutting off before you were actually full. This happens sometimes are various pumps depending on various things especially full fill rate. I have had this happen to me a few times but I know it should take more so I keep filling it and it eventually shuts off when it should.

Just be careful doing this on a new to you car where you're unfamiliar with the tank capacity and its characteristics. if you overfill a tank it can damage the charcoal canister and lead to the premature stopping every time you try and fill the car with fuel.

Yeah who knows if someone who had the car previously overfilled the tank, which had crossed my mind. One mechanic told me in those cases, that the check engine light will come on if it's something serious.

[tmontague]

Originally Posted by jowii

One mechanic told me in those cases, that the check engine light will come on if it's something serious.

not necessarily, and in my experience as well as others on this forum who had this issue in different cars, a CEL did not illuminate.

You would know if this was damaged from a previous user. You would have the pump constantly shutting off if you try to even come close to filling it at full force. You may also smell gasoline vapors when the tank is full. (this happens on my Vibe, but it still allows me to fill it fully without shutting off the pump)

[jowii]

Originally Posted by tmontague

not necessarily, and in my experience as well as others on this forum who had this issue in different cars, a CEL did not illuminate.

You would know if this was damaged from a previous user. You would have the pump constantly shutting off if you try to even come close to filling it at full force. You may also smell gasoline vapors when the tank is full. (this happens on my Vibe, but it still allows me to fill it fully without shutting off the pump)

It does have a 'lightly rough' idle occasionally, which I guess can be a symptom of something going on with the vapor cannister... But I had figured it might have just been the cold.

I can also see the RPM a little low sometimes when at a stop light. Feels smooth around 1k RPM, but when it drops lower than that, there can be a bit of a lightly pulsating vibration.