The 1.4 is a vacuum type so you could blank it off with no problems. Check there is a small bore rubber pipe connected to it.
i drove it as if i;d stolen it for about 5 miles, sure enough curled out smoke for first couple then seemed alot better.
i decided today to have a go at bypassing egr
filters all removed revealed multi plug with lots of wires from top part, no vacuum pipe ???
all back together, abandoned.
will tackle valve clean out when more time to spare.
thanks for all the help n tips so far