I just saw a similar post which startled me. A week ago my car began to lose power as I was driving. It was still driveable but I had to give it more gas for it to go and the check engine light was flashing. I took it to AutoZone and their computer read a misfire on cylinder 5. However that cylinder had just been replaced. Took it to a shop that determined I needed a fuel injector. I have spent $600 only to pick up my car and 5 miles down the road my check engine light comes back on. Something is not right about this.