Not sure if this should be Mod or OEM.. but it involves a modified engine, so here it is :D
'87 XJ 4.0L stroked & bored to 4.6, AW4 auto.
I miserably failed my smog test today. Readings were:
HC PPM@15mph: Max 133, GP 321, Meas. 143
HC PPM@25mph: Max 104, GP 271, Meas. 139
CO %@15mph: Max...