Originally Posted by
James @ M Developments.
I can only go from what i have seen and tested here while developing my Looms, And the fact that Ford themselves shielded the Map sensor 25 years ago.
I presume the shielding is probably due to the nastier environment of the Cossie engine bay.
ie long HT leads, Dizzy, old conventional single coil etc. It was probably a very noisy environment compared to some more modern stuff.
TBH I've never even seen anything on any logs on any ecu's or engines Ive ever worked at where there has been noise on the map signal.
And that's even making a plug in patch harness to run an aftermarket ecu directly in a Cossie using all OEM sensors etc