^^ Hrmm I really dont think alot of the above people are posting accurate things.
Did they claim to test it before you got it installed? They said it was a good engine and they installed it , then you paid for it? You might have something on them , best thing to do is call the BBB and see if they can help you.
2011 Mercedes C63 AMG //2009 Mercedes C350 SOLD //2008 BMW 335i SOLD //2006 Mercedes C Sold// 2002 BMW M3 SOLD// 2004 Porsche C4S SOLD// 2006 Audi S4 SOLD// 2005 Audi 1.8T SS SOLD// 2004 Subaru STi SOLD// 1994 LHD Toyota Supra SOLD//1993 LHD Mazda RX-7 SOLD // 2002 Honda S2000 SC SOLD// 2004 Range Rover SOLD//