Hussein...I've been at the same situation last year and understand your feeling. Only reason I still have the volvo is because I have a 2015 audi next to it now. It's important to have something reliable next to it that just always starts and drives comfortably...as at the stages where we are with our engines anything can happen and you never know when the next breakdown is going to be. That said, I would hate to see you quitting the XR... and although I would opt for your ENEM's, I wish you find the strength to continue! Like piet said, drop pan and lift head(can do this in a few hours) and you will know what's up.