Quote Originally Posted by matt5112 View Post
egr tube?

If you have an intercooler, are you still running garleaks?

O2 sensors oscillate because they're only accurate at finding lambda of one, thus they have to go above and below to attempt to stay close to the centre.
Haven't checked the EGR, will do.

No more Garlocs, right stuff RTV now. I couldn't believe how horrible the Garlocs were when I took them off. Oil everywhere.

My wondering about the O2 osculation was, could it be osculating enough to cause an RPM surge or slight hesitation when accelerating.