jkuga
Proven Member
- 140
- 29
- Feb 12, 2017
-
Oregon
Alright Tuners, I have been dealing with an idle issue since I purchased my GSX in 2017. I am at a complete loss of what to do at this point.
Any advice is greatly appreciated.
My idle has always been sketchy. It feels like it has an intermittment misfire.
When I got the car it was surging. Along with other maintenance items that were changed when I bought it new o2 sensors were installed. This helped but it still is not right.
I have changed the plugs twice to BPR6ES's and new NGK wires as well. Plugs were gapped to 0.028.
I have followed the sigma six idle control guide and am at a loss on how to proceed at this point.
I cannot get my iscpos and learnedidleadj to 30 and 144.
I elimated all boost leaks I found from the throttle body gaskets, injector seals, and had my throttle body rebuilt by TMZ.
I also screwed the FIAV in all the way and elimated a large boost leak from the throttle body freeze plug.
My ISC reads about 42homs when tested which is within spec from what I have seen for a black ISC. I also tested it by turning the key and it does move.
My wideband is also reading around 15 afr at idle never oscilating around 14.7. I do not have it installed in the front o2 location but used a glowshift clamp on bung on my downpipe.
I just don't know what else to check. I want to get this right before moving on.
I have a log of my car up to temp with the BISS screwed in all of the way to get the idle down. But the ISC still won't adjust to the correct position. My tps reads correct at 0.63v.
If I have no boost/vacuum leaks, the isc is good, the FIAV is not a hidden problem, and my tps reads correctly what could be causing these problems?
I've uploaded a video of my wideband at idle and of the sound it makes which makes me think its missing. I've also attached a log.
Any advice is greatly appreciated.
My idle has always been sketchy. It feels like it has an intermittment misfire.
When I got the car it was surging. Along with other maintenance items that were changed when I bought it new o2 sensors were installed. This helped but it still is not right.
I have changed the plugs twice to BPR6ES's and new NGK wires as well. Plugs were gapped to 0.028.
I have followed the sigma six idle control guide and am at a loss on how to proceed at this point.
I cannot get my iscpos and learnedidleadj to 30 and 144.
I elimated all boost leaks I found from the throttle body gaskets, injector seals, and had my throttle body rebuilt by TMZ.
I also screwed the FIAV in all the way and elimated a large boost leak from the throttle body freeze plug.
My ISC reads about 42homs when tested which is within spec from what I have seen for a black ISC. I also tested it by turning the key and it does move.
My wideband is also reading around 15 afr at idle never oscilating around 14.7. I do not have it installed in the front o2 location but used a glowshift clamp on bung on my downpipe.
I just don't know what else to check. I want to get this right before moving on.
I have a log of my car up to temp with the BISS screwed in all of the way to get the idle down. But the ISC still won't adjust to the correct position. My tps reads correct at 0.63v.
If I have no boost/vacuum leaks, the isc is good, the FIAV is not a hidden problem, and my tps reads correctly what could be causing these problems?
I've uploaded a video of my wideband at idle and of the sound it makes which makes me think its missing. I've also attached a log.
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