12-15-2013, 01:24 PM
Join Date: May 2011
Total Cats: 33
Originally Posted by kman456
pulled my freshly built turbo miata out of garage and test drove it. fine tuned maps on my AEM FIC. Runs great at idle but as soon as it sees boost it bogs down and slows down.
10 psi wastegate
it will build boost up to 6 psi and afr are 12.5 under boost.
gas in tank has sat in tank for two months without starting car.
running ngk R plugs one step colder than stock
timing is retarded 1 degree per pound of boost.
no boost leaks i can see or hear.
brand new O2 sensors
maf seems to be working.
any ideas on whats causing it to hit a wall under boost?
Does it do it at operating temp? Ive experienced some Miatas that do that while cold, but they were all running stock ecu.
The 2 month old gas shouldnt affect it
The 1 step colder NGK plugs are good, but 2 steps colder than stock MIGHT be better.
Everything else seems legit.... BUT the "maf seems to be working." Part makes me wonder. You are running an Aftermarket Management system, and still have a MAF?
I would bet it is either the MAF, or your tune, or a combo of both
Do you have any Data logs of any kind? Can the AEM FIC do that?