I finally fired off the MPI setup and have a few questions. First heres a breifing of my setup...   Magna manifold 550cc injectors Aeromotive FPR with boost reference Autometer Cobalt electronic fuel pressure gauge Summit 4-in-1 gauge (tach, oil presure, volts, water temp.) 2.5" IC pipes 60mm Australian TB 3 BAR MAP sensor Zeitronix Wideband O2 3" Turbo back with CatCo 3" cat and Summit 3" muffler Accell coils/wires Performance Electronics ECU (www.pe-ltd.com) NGK BPR6ES-11 K&N Cone filter S

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I've been tuning my car for nearly 2 weeks now and things seem to be working out nicely. Under constant rpms and/or constant load I'm always safely in the 10-12 AF ratio range.   What I'm concerned about is that my AF ratios move sharply lean whenever I crack open the throttle. Usually down to 15-16 and I think I saw a 17 once. This happens all the time, even when pulling away slowly from a stop. Is this normal? On the ECU I've gone through and cranked up my accleration enrichment numbers way up