I recently had the spark plugs replaced after 120,00 miles. Every time I put gas in the car it does not want to start at first. After it starts the car does not run smooth for the the first few hundred feet. After that it runs fine. I first thought I had gotten some bad gas. But I have run about six or seven full tanks through it plus an injection cleaner and I am still having this problem.

HELP

 

Who replaced the spark plugs? A Lexus dealer? Sounds to me like the start up problems and recent spark plug change may be related.

 

I took it to a Toyota dealership.