Just got me GTi restarted after the engine build where i replaced the original management with fez turbo OFAB gear,

but... the rev counter seems to be running at 1/2 ie showing 600rpm but idling at more like 1200

ive heard there is a fix for a mfi to cossie jus woindered if the same thing may apply for this application or whether anyone knows better?

cheers in advance