I have a 2001 Honda Civic Ex, and I just replaced the pcm, immobilizer, and got a new key (the correct part wasn't available through manufacturer or salvage, so I had to use a closely compatible part from Acura).
However, after 3 weeks of running perfectly, it started with issues again, where the car won't accelerate past 40mph. I unplugged the pcm and plugged it back in, and it worked perfectly well again. This has happened off and on for several days now.
I put an ad on Craigslist for a mechanic (the dealership won't work with me, and local repair shops don't know what to do after running about 4 scans), and one contacted me.
He said he could "disconnect something," and my car would run fine. Downside would be the car would burn more fuel. He won't tell me WHAT he is disconnecting, and said it is $100. I think he is afraid that if he tells me what it is, I will fix it myself. However, I don't want a random stranger unhooking things in my car, and not telling me upfront what he plans on disconnecting/replacing, or whatever he has to do.
Is it reasonable to expect him to disclose his repair plans before I hire him?