Thanks. Not trying to be argumentative, but im not ruling it out. To say it is impossable is 100% incorrect. It does happen to some fuel injected vehicles. It is more common on certain vehicles. If you research it there is a ton of info out there on it, and on tahoes and yukons and suburbans too. Perfect example is on earlier 4.0 jeep wranglers. Now i used to be a mechanic, and only have seen it personally on older carbed models myself.
Not saying, thats whats wrong here, but the symptoms do point to this. The clogged tank vapor system causes difficultiy fueling and pressure build up, and lastly can cause poor running if the vapor fumes from.the tank dont get returmed into the vehicle intake to burn, causing poor fuel mileage. It would not cause these symptoms. So far internet research has been showing it happens more to non return line fuel injection. Theres not a comstant flow of gas in the rails, just direct pressure.
Ive given up on mine. Mine runs great, and when it does happen, its minor. I cant figure it out. Just trying to help my neighbor cause his almost stalls and then surges massively. Mine did this way more earlier but was a non programmed throttle body and it did it all the time. It is so odd it only happens in hot weather, and only when the vehicle engine has been sitting for a little while after it has been warmed up, but niether does it in cold weather. Hes ready to get rid of his, but he said he cant afford another vehicle.
