Engine rattling / shaking after filling from spare fuel tank - P3191

Wow 3rd thread about engine rattling in the last 3 days.

Prius has been sitting for awhile. It just ran fine two weeks ago.

I did a dumb thing -- found a gallon of spare fuel lying around in the house. Decided to fill the prius with it.

Now after starting the engine rattles / shakes. I usually shut if off immediately.

After the 3rd time I got the triangle of death and a P3191.

I'm not sure if it's it's because it's been sitting, most likely it's because of me adding the extra fuel.

Could it be possible I somehow damaged the fuel pump or changed the fuel pressure somehow? Should I try to bleed the fuel lines?

 

It could be maybe a little of debris? I just filled the gallon yesterday, turned on car to check the fuel level, but did not start. Today it started doing this.
I'm just using a regular OBDII reader.
I could try cleaning the throttle body.

 

Glad I'm not the only one who tried to use old fuel

Thanks for another thing to try.

It looks like you're in really cold climate. In Bay Area, CA it doesn't snow, but once a while it goes to near zero.

Did you replace the spark plugs also?

 

Are my posts getting blocked?

 

ok, i think my first posts were flagged since i have a new account.

 

There was some dust on the throttle plate and inside the body. Cleaned it a bit. Also cleaned the maf sensor since it was right there.

Put it back together, tried to turn it over and found the 12v was dead, lol.

Going to have it charged tomorrow to see if this helped.

 

Well I charged the battery, but no go. It's still shaking/shuddering, and noticed a repetitive clicking noise also like from something rotating like a belt.

I guess all I can do is try to drain the fuel. I was looking around, looks like prius has some anti siphon mechanism so that method is gone.

I was searching around, it looks like you have to:

1) remove the back seat
2) break the seal on the fuel pump
3) disconnect the fuel line somwhere and attach a hose
4) apply voltage from the 12v without blowing myself up to activate the fuel pump

Does anyone have an easier way or specific steps on how to do this?

 

Actually looking at other threads, it may be possible to just short on of the jumpers in the fuse box instead of opening up the back to get to the fuel pump?

Nelson how did you drain yours?

 

Hi Qbert,

Won't the engine stop with no fuel if you disconnect? I need to drain the entire tank.

 

Seriously. if it can be diagnosed by a human, then a computer should be able diagnose it also. Throwing a generic code isn't really helpful.

 

is there one to download?

 

Is this the fuel line?