I run a 130ps 1.8 Zetec in my 98R Escort Si, it has the EFi manifold & ECU & AFM.
I replaced the rocker cover with a nice Red one which is the old style one which said DOHC instead of Zetec 16V on the bottom left.
Soon after replacing the rocker cover (could be coincidental) I noticed the car sounds like a bloody diesel! Sounds like tappets are loose on an old 1.3 CVH fiesta
Any ideas? I noticed when taking the rocker cover off the bolts were all quite loose, so I've torqued them up a bit when putting it back on (but not much)
Could it be that plate on the inside? which sits at the back where the breather is and covers about half the cam. It's in the same position on each cover