Hi all.

Am not really a `mod` kind of person but want to get some new HT leads for my ST, I have read that it improves the idle of the car. My first question would be `which leads should I get?`. Bosch ones from Halfords for example or better ones designed for the ST?
Second, how easily does the airbox assembly come off to access the leads?

Thanks

I had a set of Magnecours on mine and TBH, couldn't really notice much difference.
Standard Ford ones are of better spec than what Halfords sell anyway.

What did make a difference to the idle quality/starting though was the extra engine earth strap that I fitted.

tell us more dave, what parts of the car did you fit the extra earth strap to, where would I get one.
Mine now is a smoother tick over only because of the mountune settings which now has it at 1000 so less lumpy anyway, but sounds like a good tip from you.

you won't notice anything from just changing the leads alone. Pre-mountune I changed plugs to Denso and leads to Magnecor, there was a small but noticable difference, slightly smoother tick-over and slightly sharper on throttle. If say your due for new plugs and leads are looking a bit rough I would upgrade at that point. If you have spare cash then do it anyway, colour leads look better..............

could this cause any electrical issues when doing it with any car systems - I know nothing about electrics I'm afraid - dont want to blow some fuses up or something ?

No, No issues, it's just an earth.

The more earths the better the system works, the less earths, the less it costs!!

TVM rules OK

As you look at the engine from the front of the car the engine lifting eye is at the rh rear of the rocker cover, right by where the breather pipe comes out of the rocker cover.

Undo the 13mm bolt that fixes the lifting eye to the cylinder head and refit with the earth strap.
Torque is 40nm for that fixing so make sure it's tight.

Thanks Dave, you the man