2017 Toyota Prius FUEL/PROPULSION SYSTEM

During hot temperatures and after coming to a full stop, the car stalls/hesitates significantly (5-6seconds) when pushing the gas pedal. The car eventually proceeds but the issue reoccurs. It can only be intermittently reproduced and no codes are shown on the car dashboard. Mechanics are unable to identify the source of the issue so it cannot be resolved.

While filling my Prius with gas, as soon as I started pumping, it spewed gas all over my arms and shirt, as the gas would not go down the pipe into the gas tank. My mechanic explained that gasline exhaust valve was stuck causing the gas to spirt back out the intake opening. This part had to be replaced. Firestone replaced it for a total of $337.08, however, the dealer would have charged more. It was not covered as a defect issue. The experienced mechanic said that he had seen this problem on several Toyotas. This is hazardous and Toyota should repair those that exhibit this problem; also they should change their design so that the exhaust valve does not fail causing gasoline to spill on the person pumping gas and all down the side of the car onto the cement pavement.

When filling gas, a near-empty Prius overflowed almost immediately, splashing fuel over the car, the ground, tires, and my feet! Gas is flammable and not good to get on one's skin. Firestone experienced/certified repairman said that he's repaired many Toyotas with the same problem. No advanced warning was presented. Last time I filled it before this incident it worked fine. Technician said that the air-exhaust that permits air to escape while gas is being delivered to the tank had failed to work properly, causing the fuel to spew back up the gas line and on to the car/ground. He had to order a part from Toyota and replace it. This cost me $337 for part and labor. I believe this is a malfunction that Toyota should cover. This part should not fail as it could start a fire and contaminate the car, ground and put petroleum on people.

THE VEHICLE WAS RUNNING AND STOPPED AT A STOP LIGHT. WHEN ACCELERATING TO PROCEED FROM THE STOP LIGHT THE VEHICLE WOULD BARELY ACCELERATE NO MATTER HOW FAR WE PRESSED THE GAS PEDAL DOWN. THE ENGINE WAS NOT REVVING FASTER IT JUST APPEARED TO STAY IN EV MODE WITH VERY LITTLE ACCELERATION. FINALLY AFTER ABOUT 5-10 SECONDS THE CAR STARTS ACCELERATING. WE ARE VERY CONCERNED THAT IF THIS OCCURS AT A TURN ONTO A BUSY ROAD WE COULD BE IN A POSITION WHERE WE ARE STUCK IN THE MIDDLE OF ONCOMING CROSS TRAFFIC. THIS IS VERY INTERMITTENT, MAYBE ONCE OR TWICE PER SUMMER (USUALLY IN THE HOTTER TIMES OF THE YEAR). WE'VE HAD THE CAR AT THE DEALERSHIP AND BOTH TIMES THEY HAVE SAID THEY FOUND NO PROBLEM. SEARCHING ON THE INTERNET THIS SOUNDS LIKE TSB-0241-17, WHICH I HAVE SHARED WITH THE DEALER BUT BOTH TIMES THEY HAVE INDICATED THEY SEE NO SIGN OFF A PROBLEM.

UNABLE TO FILL GAS TANK. VAPOR-CONTAINMENT VALVE ENGAGES DURING REFUELLING, CAUSING FUEL TO SPILL TO GROUND AND UNABLE TO FILL MORE THAT ONE-HALF GALLON OF FUEL. SEE ALSO: HTTPS://PRIUSCHAT.COM/THREADS/INTERESTING-FUEL-ISSUE-2016-THREE-TOURING-OVERFLOWING.173660/ (SEARCH FOR "OVERFLOW" - YOU WILL SEE THAT THIS IS A COMMON PROBLEM)