Ok so now I have tryed 2 brand new engine coolant temp senders and the afrs change so ecu is definatelty getting a good temp signal. then I noticed the afr gauge showed 22.4 whilst the car was running which is impossible so I am pretty sure the afr sensors had it. also as I said above when I pulled plugs and checked them the other day they were tan which surely wouldnt happen if the car was running afes as low as 7.4. I am quite sure bosch sensors gone, will try and calibrate and see what happens but my "issue" is solely based on the afr gauge so I might have had a wild goose chase anybody had an afr gauge give dud readings before ????