Hi, i have a 1997 miata that i just turboed. Its tuned on megasquirt gen 2. Once I finished installing everything i started it and the idle kept climbing about to redline. So i switched it back to the stock ecu to see if it was a tuning problem, same outcome, so i read forums for awhile and everone said IAC so i replaced that and of course same thing was happening. I finally had the genius idea of disconnecting the wastegate rod to see what would happen, on the stock ecu it idles really rough and stalls out with no throttle, with the wastegate rod connected it revs up. On megasquirt with the rod on or off it revs up. My assumption is its catching boost at idle and just starts revving the fuck out of itself because i can hear it spooling up even with the throttle closed. Any ideas on what i can do? Thanks!

Im running rx-8 yellows 420cc. I had the injectors in before i turboed the car and it ran rich but performed just fine. I actually had someone tune it for me so i dont have the log but it was sent to megasquirt for review and they said everything looked fine.

yea ill have to look for one. I have the skunk 2 racing intake manifold so it’s possible its leaking out of where it splits in half for cleaning and that would be a big enough leak so ill have to check that out.

it shows vaccume but you can hear the turbo slpooling up which is weird

Thats what i thought too but it still has the problem on the stock ecu