Car is an '86 635csia,the problem is that it runs sweet as a nut for 2 to 20 miles and then either cuts out or will not start again when hot. When it turns over it is trying to start but stinks of fuel and then hydraulically locks due to too much fuel in the cyls and backfires in the exhaust. Leave it for 1/2 hour starts no bother till it goes through the same routine again. Also anybody know where to view an online parts catalogue?