So I recently bought a 2007 toyota four runner with the v6. And one day I got in to start it and it started fine went inside and when I came back out it was dead. Tried starting it again and it idled poorly and than died and would start again. So I had it towed to a toyota dealership and they said it was bad fuel there was black stuff in it and I have only bought gas for if at costco. So they clean the injectors and drain the tank and flushed the lines and than it ran perfect for a couple of days than I just filled it up for the first time again at chevron with plus fuel and than I drove it to another store and when I got back in it. It started and than died. So I sat there a little while and started up and I rushed home and halfway home it started running like crap so I let it idle for a while when I got home than I turned it off and tried to start it again and it idled poorly and died again please help I just bought the car on November 4 2013 it has 68000 miles on it.

 

Loose or corroded ground wire/battery cable, worn spark plugs and/or wires, vacuum leak, dirty MAF, dirty air cleaner, etc..... i.e. start at the basic maintenance items.

 

Don't ever buy gas from Costco. The situation here reminds of one a few years ago.

Oil pipeline company mistakenly sent gas down a diesel line. They needed to unload it on someone. Guess who bought it? You got it - Costco.

While I like their stores in general, you need to understand that they and Walmart especially are very quick to buy junk fuel on the open market and in turn pass it off on their customers.