Ryan Jones

Ok my girlfriend's 08 grand Cherokee with only 95K miles will only stay running when accelerated but will not idle at all and still doesn't have full power. Her father tested fuel pressure and said it was at 55 psi and almost shot him in the eye. He also took exhaust off to make sure it wasn't the cadillic converter clogged up. He did say that the front passenger cylinder didn't have any compression. Her dads saying it would probably be cheaper to buy a used motor to put in it but he's not really used to working on vehicles this new and complex. The only code its showing is the cylinder misfire. What else could he check before we have to break the bank?