I'm so glad I found this thread on Google. We had massive rains in Dallas today and I had to make my way through a few small lakes to get to work. I left the office early to avoid traffic, but the check engine light turned on and my car started to shake a little, then a lot. It felt as if it wasn't going to make it to the end of the street.
I stopped on the service road, turned it off and on again and it did the same thing. I gave it a couple of minutes, then got on the road again. it didn't shake anymore, but the light stayed on. Thankfully a dealership was only a few minutes away.
I was told the same thing about carbon build up, but they didn't tell me anything about how to avoid it other than using decent gas. I bought the car used last September. It had one previous owner and around 34k miles. It's at 42k now and I've made every oil change on time and I only use Chevron gas. I guess I have the previous owner to thank for almost not making it home tonight.
They're going to clear the build-up and update the computer, but the guy also wanted to go ahead and replace the spark plugs. He said they didn't really need to be changed until 60k miles, but it wouldn't hurt to do it now. If the spark plugs aren't at fault here, is there any reason to change them now? I'd rather not spend the extra cash if it's not necessary.
Thanks for the info.