What was the purpose of the maf sensor wiring mod?

[highwayman306]

the early HDI looms suffered from poor connections within the loom (common crimp point joints)
How early is this cully?

the side effect of this was the ecu would log a inconsistency fault on the TPS and the IAT sensors
the earth mod would fix it
What other noticeable side effects, other than codes and lights, would this show?

Cully is correct, this is a really common issue and causes some proper irritating engine lights / codes. Have resolved a few cars with this fix now!

I had never heard of it glad it was brought to light though