Brady, > Could a boost leak cause a 4k cutout? Nope, boost leak would not cause 4k cutout. http://www.sjmautotechnik.com/urq.html Hope this helps Martin Pajak http://www.quattro.ca 1983 Audi Ur-quattro (289,000 km) Canadian spec. winter car 1985 Audi Ur-quattro (166,000 km) Euro spec. import ;o)