My project Miata is running, though not yet in it's full glory. We're running it normally aspirated for the first 500 miles just to break in the motor before strapping on the turbo.
We're having some problems with an apparent fuel-cut under part-throttle, low load conditions. The cut-out cycles about once per second. No stumble, no missing, just a clean cutoff, then as rpm drops it comes back on. The WBO2 gauge shows full lean when this happens. (WBO2 not connected to the Link ECU at this point.) The current setup is a built '97 bottom end with a '99 head, running stock injectors, naturally aspirated for now. ECU is a Link from a year 2000-era FM2 kit, using a MAP sensor. Any ideas as to what could be causing this fuel cut? Doesn't sound like a fuel pressure issue. I can't think of anything within the Link that would cut fuel like that. I'll have some time to play with it this weekend (I'm out of town until Friday), but for now I'd like to give my mechanic (Henry Payne, CCed) some things to check. Thanks, guys! --Jerry
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