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?

 

videos no work.

 

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.

 

I get this problem on cold starts. Takes 3 times to start if its really bad. Once it hits 100* is levels out

 

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.

 

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?

 

I've ruled out everything but my CAI...so its quite possible that it is tuned related...

 

I'll agree that it's most likely the tune.

 

Who are you tuned by sir_hero and what size injectors are you running?

 

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

 

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.

 

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.