good day one and all,931 seeks devine intervention
 

hi, hows things? new to this forum and would appreicate any input have currently been aptempting to overhaul my 924 turbo (why says the wife) after going to a rather dodgy garage that didn't actually do the work they charged me for.Cars sounding a little tappety , possibly losing compression but not a lot ,quite a strange noise coming from what appears to be front section of exhaust just after the manifold .little like a quiet tractor , deep throaty sound from rear and running smoothly any idea's as close to losing sanity many thanks joff