fletchcountry
NAXJA Forum User
- Location
- Utah
My 94 xj just failed an emission test in Utah. The tech said my NOx was too high and the problem was timing, cat converter or EGR valve. I put a new cat on two years ago with a stage 2 chip and the timing is computer controlled. Would the egr valve cause high Nox readings and is it possible to change the computer settings for the timing? What are my optoions?