was it warmer than normal mate, causing your act's to be higher

also, the KE jetronic (if u use it) isnt the best fuel deliverly system around and can have a mind of its own sometime when running more than normal, mine does the same mate, and mines setup by a similar company to msd,


i had the fuel pressure mod though rather than a fifth injector and now and again i hear mine pink on high boost

i take it ur using a proper mf2 5th injector?