Just had head skimmed and put new head gasket on. Car now does not boost over 15psi and has a bit of a stutter higher in the revs.

Before I did the head it was boosting fine up to 29psi with no stutter. I have not changed anything else since this.

All usual bits were changed before head was done (leads, dizzy cap, rotor arm plugs gapped to 0.65mm etc).

Could it be a punctured boost/vaccuum hose? No noticable hissing.

At a bit of a loss on this one....



Pete.