Hi - Thanks for all the replies. This was a difficult part to find but in the end I got one from VW Parts International (£82.94 including delivery). The original part number had a B suffix but had been discontinued so had me worried. There is a similar hose with the same part number but a F or G suffix. This has a much longer hose on the left branch so possibly went the a carbon canister as has been suggested. I have checked the Corrado parts catalogue for 91 to 95 and the part 021133518H is the same in all. (mine is a 94)
The part was available from a few sources in Europe at a cheaper price but higher delivery costs.
The hose on my car had split and was causing tick-over and stalling problems including the common stalling when clutch depressed. Fingers crossed all solved.
Thanks again for all the help. DB.
