dx4picco Posted April 19, 2020 Report Share Posted April 19, 2020 Setup: Wrx4+ on 98 STI all stock but catback I am having a hard time getting a stable combustion at lower MGP while coasting (-80 Kpa). I already changed injection angle to the middle of the lobe at high vacum to avoid back flow, injector actual PW is above 1.2ms (stock yellow 440s). Plugs are iridiums .7-.8mm gap, regular heat range (not colder) I tend to give it a bit richer, it shows like 0.85 then I say great I remove like 10% VE (relative) and sometime it gets to .92 .95 but can also jump to 1.1 1.2 in that same area any other tips to get it combust right? later ignition angle to let the compression heat a bit more the gases? https://drive.google.com/open?id=1BS0TdvLjExr2qhx_0I8KG7e9tB_Md1lh https://drive.google.com/open?id=16C-DFfbzLxbzUB_icQJwBJK4aWOG4XgK Quote Link to comment Share on other sites More sharing options...
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