Hey y'all. It's been a while since I've been here. I sold my last miata a few years back and recently picked up a kart to start messing around with. It's in the process of getting boosted (as in i have all of the parts and none of the time). Anyways, last weekend I replaced my injectors with some ID 725cc (going E eventually) and installed an MSPNP2. The timing is set in tunerstudio as well as the injector size and type and it idles great. It also will rev out to redline as long as I never increase throttle input by more than 15% at a time. Anytime I give more throttle than that I get a heavy stumble and the AFR leans out, then it collects itself and calms down. I checked for vacuum leaks at the injectors with some starter fluid with no idle up so I'm assuming they sealed. I figure at this point its probably my fuel pump not supplying enough pressure for those big boys but I wanted to gather some input on other possibilities while I wait for my new pump to arrive. What do y'all think?

 

Sounds like a problem with your acceleration enrichment settings

 

Yeah, it sounds like you need to tune them. There is no such thing as plug-and-play. There is however such a thing as plug and tune.

 

Ah I did neglect to make any changes there. I'll take a look after work tonight. Thanks boyo