Thank you, was going fine before the new starter was fitted. It appears one of the magnets became unstuck and was ground up by the armature. Tried to start it one day and all it would do was click the relay. Not sure how to test it with a timing light, seems a good line of enquiry. 1ml of new petrol squirted into the plug hole has no effect. usually will produce a firing. Unaware of any vacuum hoses. only cabling was an earth wire to the starter ( as well as the live wire).