S/C strange idle and AFRs
08-17-2012, 05:32 PM
#1
S/C strange idle and AFRs
Ok so I figured I'd just upload some videos and let y'all take a look. I've got this bouncing idle, almost like a cammed motor but it's not. The tach needle isn't bouncing much but I can hear it and my AFRs at idle are really jumpy.
I'm thinking it may be injectors but wanted y'alls input. Maybe a bad cat?
I'm thinking it may be injectors but wanted y'alls input. Maybe a bad cat?
08-18-2012, 02:04 PM
#3
Damn. I was afraid of that.
http://i58.photobucket.com/albums/g2...F4F1411EAC.mp4
http://i58.photobucket.com/albums/g2...F3F86B31CD.mp4
I'm also running 4 codes. Rear o2 sensor not being there. P0315. Random cylinder misfire. And I believe bank 1 lean.
http://i58.photobucket.com/albums/g2...F4F1411EAC.mp4
http://i58.photobucket.com/albums/g2...F3F86B31CD.mp4
I'm also running 4 codes. Rear o2 sensor not being there. P0315. Random cylinder misfire. And I believe bank 1 lean.
08-18-2012, 02:24 PM
#5
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Have same problem..But no idea what it is..Its not my TB..My AFR goes from 11-15..as it matches the idle..and my AFR isnt that stable crusing either..so I suspect is a bad tune or something else.
08-18-2012, 04:59 PM
#6
So it's probably just something I'm gonna have to get used to until I get it dyno tuned?
Honestly it's acting like my MAF frequencies are off. About a year ago I put in a full cold air intake and I was getting codes for cylinder misfire and running lean all because of the intake. I went back to a short ram and everything was fine again. I replaced my MAF back then just incase so I don't think my MAF is bad. But when I had the full CAI I was getting these kind of problems as well. Maybe it's something similar to those problems caused back then too?
Honestly it's acting like my MAF frequencies are off. About a year ago I put in a full cold air intake and I was getting codes for cylinder misfire and running lean all because of the intake. I went back to a short ram and everything was fine again. I replaced my MAF back then just incase so I don't think my MAF is bad. But when I had the full CAI I was getting these kind of problems as well. Maybe it's something similar to those problems caused back then too?
08-18-2012, 10:44 PM
#10
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I dont know who tuned me it came with the car..same with the injectors..but they handle my 2.9 very well with low IATs...I beleive they are 60s based on what I saw when I took the cover off
08-18-2012, 10:49 PM
#11
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Check for Vacuum leaks.If your Trifecta tuned,there is your problem.Every 2.2 I've seen go from NA to F/I with Trifecta has had this issue.Tundraboarder666's LS did it and as soon as he went HPT,it stopped.
08-18-2012, 10:57 PM
#12
I've checked for vacuum leaks and haven't found any. I am trifecta tuned though. Was supposed to be HPT tuned but that didn't pan out so Vince was just To get me running. I've got a shop that will full dyno tune with HPT for $500. But I want to get a real CAI, header/dp/catback, option b/dual pass/phenolic spacer first so the car is all done and I don't have to do anything further to it.
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