yup you guys are right. so check this out. heres the update
i paid 160 for new 02 sensors because the car needed new 02 sensors to make it run correctly he thought.
he now called me today and said that the engine has low compression, and he called the place he got the motor and told them to give him a new one. but they want to look at it first, and that it may need new catalytic converters and thats what is causing the problem. so i already now tomorrow im going to get a call with a price for new catalytic converters the car needs(?) would new converters fix compression?
oh man, dude, dont give that guy any more money
first off, catalytic converters have absolutely NOTHING to do with engine compression, plus if he gets you to buy new ones, he can sell/recycle the old ones for a pretty penny. engine compression is lost by.... you guessed it, heads, head gaskets, piston rings and valves.... so if he says your used motor has low compression then it's probably one or more of those things....
get Autozone or someone to read the Engine Codes and report back here with the code numbers, i've got a whole book that tells me what each OBDII code means, and i'm sure the other guys on this forum could tell you just as easily too.
i agree with documenting every transaction that has taken place (rather it be verbal, written, financial, ANY kind of transaction of information or money) and possibly taking legal action. dont let this guy rob you, especially with the economy like it is.....
also, the fact that the "engine swap" took a month sounds kinda suspicious as well. unless he was just absolutely covered up with other work, an engine swap shouldnt take that long unless you're waiting on ordered parts to come in, or if you're a backyard mechanic just taking your time and learning as you go. to me, that says he didnt make your vehicle a priority and just let it sit there while he did other work and then just did the bare minimum to get the vehicle out of the shop so he could get paid