About how much does a tuneup run? What do they do? When i had my Explorer the dealer always looked at me like i was an idiot when i asked if i needed one. They also told me that there was no way they or I could clean my MAF sensor and that it would have to be replaced. As far as the seafoam goes im not too sure i want to do that on this car. I did it on my last car and the catalytic converter got really clogged up and went out. I'm not sure if that was the cause. My battery is good i had that checked out. Im going to have to try to start it like dna said, i just drove home so im going to have to wait a little while.