Noisy manifold.

[Mark S]

Originally Posted by stamford

Firstly

Not repairable even though some have looked into it. This is assuming it is definitely the plenum that is faulty and not mistaken for faulty vis valve mechanisms. The '98 plenum model intrigues me, didn't think there were any in circulation then?

could it be from the ZT190/160?

[stamford]

Originally Posted by Mark S

could it be from the ZT190/160?

A '98 model would be an 'S' reg, not even the 75 was out then, unless there were 2.0 KV6 in the 400s? Which I doubt, but I may have missed a model somewhere having this set-up. Could be a pre-production model with that year stamp that found its way onto the market?