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Idling issue/running rich with video

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horizontalkev

Supporting VIP
1,001
2
Jun 28, 2010
great bend, Kansas
99 GSX 6 bolt. T28, wally 255 rewired, Tial BOV atmospheric w/ maf-T..

(This is all while idling or reving in neutral) Usually, I get a little black smoke from the tailpipe and sometimes ill get a loud backfire at higher RPMs. Also when I rev, and my RPMs drop it will almost die and start running lean and in general run bad for 5 seconds all while the lights flicker then go to normalish, in the video you can also hear the pumps tone change with the power fluctuations/rough idle. Last half of video is of the tail end, to see the smoke (and a little awd action :D ).

During the video its about 7° outside, and the engine temp was roughly 140F. What do you guys think? Im stumped.

https://www.youtube.com/watch?v=5BaH8XsfhVU&feature=youtube_gdata_player
 
ARe you using the narrowband as a indicator of way to determine air fuel raitos? Idle issues did you do any boost leak tests?
 
No I am using an innovate wideband, the video shows that. And I might have some small boost leaks but at idle it really shouldn't matter, right? Especially if my maf is right before the throttle body.
 
Will throttle body seals cause my idling issue? Remember I sometimes run very lean for 5 seconds after reving, with flickering lights. I think I have multiple problems going on idk
 
I attempted a boost leak test earlier but during the test at about 4psi my soapy water was freezing (7° outside) . Just in the 4psi I found two of my couplers were loose both fixed. Also, my biss screw was also leaking some not fixed (Will use silicone). When it gets warmer I Will attempt another boost leak test up to 15 psi
 
A leaky BISS screw would make your idle go up not down. Anything leaking after the TB butterfly will make your idle go up. ISC may not be working properly.
 
Your running a maf-t try messing with the wide open throttle setting...

I was afraid somebody was going to say this. I hate maf-t besides I have taxtrix for ecuflash might aswell use that right? I just haven't unboxed it (waiting for friend from wichita to come by and show me how to use it)
 
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