Bear with me I'm far from a mechanic
so you may have to "dumb it down for me on the automobile lingo" I am however a do it yourself girl so I will attempt to describe my problem a best as I can. I drive an old 2001 Saturn
it had the motor replaced a few years back so this one has approx 100k miles. Just recently on the freeway the car felt like it was losing power not getting enough gas to make it go the speed I needed. At the same time the check engine started flashing. This happened for about 3 minutes then all of a sudden it seemed to get a burst of gas and went just fine until I exited the freeway and came to a stop. It started shaking, sputtering and felt like it was going to die but never did. The next morning I drove it to work 30 miles away no problem. Later that day on the way home same thing as the car and temp got hotter the car started losing power. Seems to happen when it's hot out not so much when it's cool. In my self diagnosis I thought fuel filter, changed that and the next morning ran great. Again in the afternoon same thing but worse so I pulled over and had it towed home. I had it in park revved the engine and realized that at 4k RPMs exactly is the beginning of the lag, it also backfired and smoke came out the exhaust. Additionally there was a significant gasoline odor inside the vehicle. More research and I decided it was spark plugs, changed those no difference. Now I'm thinking fuel pump or vacuum intake hose. Again all guesses derived from the vast knowledge I received on you tube. Any ideas I really need to stop spending money guessing. I have concluded the outside temp effects it considerably. Thank you in advance.