I am having issues with my 2009 Toyota Corolla. I have ~110k miles on it, and I am the 2nd owner. I am not educated on cars whatsoever, so please excuse me muddling through this.
Back in August, my car started having some issues. I noticed the check engine light would come on at random times while I was driving. When this check engine light came on, I noted that my car sort of stuttered a little. For example, I would be driving down the highway at ~60 mph, and my car would suddenly slow down just a bit. I was able to bring it back up to speed quickly though. This happened a few more times randomly throughout the next few months.
In late November/December, however, this issue got worse. I would be driving my car, and the check engine light would come on, and my car would slow down, and continue to slow down. I would be bumbling down the road at ~25 mph with my car not responding to the gas pedal. This issue would happen at any time, too. It would happen 10 minutes or 30 minutes into my drive. It would happen if I were taking city streets the entire time or if I were on the highway. I took it into a repair shop, and they read the code, and said they couldn’t find the issue/replicate the problem. I took it into the Toyota dealership to get them to check it out. I cannot remember what the code was (I will update this post after I talk to the dealership Monday), but they ended up replacing all my spark plugs and coils. This occurred in December. I thought the issue was fixed, but it was not.
Last week, my car started doing the same thing. I would be driving to work, and suddenly my car would stop accelerating. I mainly drive highway miles to work, as I work ~30 miles from my job. For example, I would be driving ~60 miles an hour on the highway. My car would stop accelerating, and slowly, but surely, my car would slow down. I would be able to maintain it ~40 mph; however, if traffic was to slow down, my car would not be able to speed back up to 40 mph again. It could only get up to ~20 mph. I would be pressing as hard as I could on the gas pedal, and nothing happened. Occasionally and sporadically, the RPMs would shoot up and I would get a burst of energy. This was short lived though, and my car would go back to ~20 mph. Eventually my car would get out of this “funk”. This issue lasted anywhere from 5 to 20 minutes. This happens every time I drive the car too.
I took it to autozone earlier this week to get the code read, and it said “Ignition Coil A Primary/Secondary Circuit”. I called my dad, who is pretty educated on cars, and he suggested getting a fuel injector cleaner. I did that, and the issue is still happening.
I am incredibly fed up with this issue. I have already put ~$400 into this issue, and it is still not solved. I want to fix it the right way this time and not feel like I’m throwing away my money. Please, please help me here. I am at my wit’s end, and I do not want to have to buy a new car! Thank you in advance.