Let's revisit my vibration issue
I figured now that there are some new people here, maybe they have some ideas for me on my vibation issue. Let me give a bit of background.
Last spring I had a leaky rear tire. Took it in and had it fixed. 2 things that MAY have happened. My car "may" have hit the lift (I didn't stay with it this one time...grrrr) and/or when "test driving" it the tech ran it over redline ( I have no rev limiter as I'm tuned and it was removed..and yes, my car pulls just as hard at 6k as it does at 2500, and if you aren't familiar with it, it's very easy to go past 6k and not realize it!!). When I got it back, I noticed 2 things. The first was my exhaust was weird sounding. So I looked underneath and I noticed the mesh hinge was failing and what looked like scrap marks on the front portion. I also noticed it was resting against the driveshaft tunnel. So I ordered a new front portion from Solo. The second item was the vibration that I now had....
My car has an ear shattering, nasty "smooth" (if that's possible) vibration from about 900rpm to 1500rpm. I cannot figure out why. I really don't want to tear the front open and replace the timing chain if that isn't it. My car has 82k on it. I have done some prehistoric data logging and can tell you this. My commanded AFT was 29.4 during FCO last year prior to this issue. It's not 27.58 during FCO. It appears to be running just a touch richer as well. Last year at idle it would usually stick to 14.7, 14.58...then after it went to 14.5...14.2. My other concern is that my downstream O2 sensor ranges from 0.89 to 1.2....which I don't believe it is supposed to do. So, 2 years ago I replaced the HPFP. I have replaced the spark plugs last summer. I have done the thermostat last spring. I don't have a hold in my IC. I cleaned my MAF. I cleaned my air filter (CAI Fujita). I have unplugged HPFP, both O2 sensors and MAP sensors, cleaned them and plugged them back in....
Please help!!! I really don't want to do a timing chain if that's not my problem....
Things I'm leaning toward...
Lazy Fuel Injector
Throttle Position Sensor
Dirty throttle body
Solo Street Race exhaust
ASAP T2 stripes and badging
Windrestrictor V2 lighted in white
Windrestrictor lighted door sills lighted in white
DDM Works IC Piping
Undercar LEDs in white to match Windrestrictor
ZZPerformance dyno tuned - 286HP, 317ft/lbs of torque at 23psi of boost.