Howdy yall, Im having some misfire/tuning issue with my car. Ive got a 91 miata with a 94 motor swapped into it, along with a set of yellow top 420cc injectors and some headwork. Ive been trying to get this car back on the road for a while now and ive ran into some issues and im completely stuck. Car has a very noticeable misfire with a distinct pop pop pop coming from the exhaust at idle. Everything ignition related has been replaced with oem parts (ignitor, coil pack, plugs ((ngk)), wires ((ngk)) however this misfire is still there. When I first bought the car I swapped the ecu to a speedyefi na6 pnp and used the basemap they provided and the car ran alright but had the same misfire, fast forward to today and ive got the same misfire but with new components which makes me think its tuning related. Ive checked my timing over and over and made sure its right. Ive attached a data log of the car idling and hopefully someone can point me in the direction of what i need to do.


Car wont start unless I give it 15%+ throttle and hold it for a few seconds then i can super slowly back off all the way. Ive adjusted the ve table in the idle/cranking area and was not able to fix it.


If the log i provided dose not work I can provide one thats longer or go make a new one.

car sold for 3500 this morning

 

I don't see a log.

I would do a compression test or leak down test to eliminate valves and rings as possible culprit. Next on the list I would be likely to point a finger at yellow RX8 knockoff injectors that are known to be trouble. Send them out for a check if you dare. But there may be some other problem in your tune that we can't see yet.

 

My bad, attached is the log and my current tune.