Well,

We're definately newbies here so my apologies if this has already been beat to death. We put a TPI ECM on a 427 BB (mild cam) and we're starting to tune. BLM's are darned low (like 108) when in cruising cells (2400 RPM and 45KPA). So obviously the VE table is off. But im having problems keeping this thing in closed loop long enough to get some good BLM data points. It keeps going to open loop. Is this because the BLM's are too far out of whack? Also Datamaster records a bit called (COP2<54MS) and it's flipping all over the place. What the heck is COP2?

Lurking & learning


Thanks
Steve