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I have an interesting problem.. I am using turboedit 2.6.1 with the ng60 code.. I have the idle tuned in for the most part 14.7-15.2 and according to the vacuum gauge it's at -20inhg. The problem is that when i hit the gas and come back down to idle the afr changes. Sometimes it reads as rich as 12.0 for about ten seconds and usually it comes back to normal but then the engine sounds like it's missing.. Has anyone else had this problem or one similar any help would be greatly appreciated.

mine does the same, fuck today I idled @ 17:1 on a cold start @ 800 rpm and about -19vac, then after I blipped the throttle it came back down to about 13.8:1 where it usually sits

I think I have an exhaust leak at the downpipe flange though

Im using the same code as you though