Unless the seller put in writing that he installed new parts you are probably out of luck.Used vehicles from private parties are sold "AS IS".So the lemon law won't apply. Sorry.Good luck with this.

First of all people here (at Y!A) use the term "Lemon Law" loosely.The Lemon Law actually only applies to a BRAND NEW vehicle. It is an agreement between the FIRST owner & the MANUFACTURER of said vehicle. NOT the 'dealer' or 'seller' .http://www.lemonlawamerica.com/Buying from a private seller was your 1st mistake, & listening to your b/f was the 2nd.When you buy from a private party, it is sold "as is, as shown",Buying from a dealer, especially a NEW car dealer, you may have some recourse & rights.Having ANY used car checked out by a QUALIFIED mechanic/technition (obviously your b/f is not) is only smart.You shoulda paid a few bucks to a qualified tech. to save yourself hundreds.Sorry!