Found this was hanging off clutch pedal, causing all sorts of problems:
http://www.flickr.com/photos/67024256@N07/6431873561/http://www.flickr.com/photos/67024256@N07/6431873561/ by http://www.flickr.com/people/67024256@N07/, on Flickr

This little cap had got perished and was causing air to escape from the throtle body and cauising the car to stall.
I also cleaned out the throttle body and MAF sensor with carb cleaner, made a big difference to performance.
http://www.flickr.com/photos/67024256@N07/6431760145/http://www.flickr.com/photos/67024256@N07/6431760145/ by http://www.flickr.com/people/67024256@N07/, on Flickr

http://www.flickr.com/photos/67024256@N07/6431762963/http://www.flickr.com/photos/67024256@N07/6431762963/ by http://www.flickr.com/people/67024256@N07/, on Flickr

Continued rust treating the underneath:
http://www.flickr.com/photos/67024256@N07/6431771649/http://www.flickr.com/photos/67024256@N07/6431771649/ by http://www.flickr.com/people/67024256@N07/, on Flickr