b4rs,
Just a stab in the dark m8 but can you borrow a speedo off anyone and try that.
Just had a similar prob myself was sorting it 2day infact. Mine didnt lose power as such just got glitchy when the car was away from me, changed everything 1 at a time, if it didnt cure it i put it back on so i would know what the fault was.
And the speedo was the last thing but cured the fault !
hth's
__________________
|