FVD Exhaust install throwing off O2 Sensors and other things.
07-20-2017, 06:23 PM
#16
It was a tiptronic car. I referred to an ATF replacement of the transmission. Fluid and filter change.
Your symptom is a stutter when driving off or when changing to a higher gear. Mine were that when shifting back it stuttered.
It was only weeks later the transmission started to act weird. Besides the stuttering I got unsteady power transfer in te low rpm ranges 1000-2000rpm.
It has to do with the O2 values. But the ECU will try to act on them. The ECU and the TCU are very linked. So the distorted engine performance sets the TCU off to act weird. Maybe if you can make the O2 problem go away it will act again normal. But me and my Indy tried everything. The tiptronic cars are not so suitable to tweak with performance mods like exhaust. Don't underestimate the complexity of the TCU it takes a whole lot of parameters
With manual cars cars no problems.
Going back to stock and all problems went away. You will find out.
My car is now a manual. My Indy transformed it into a manual.
Your symptom is a stutter when driving off or when changing to a higher gear. Mine were that when shifting back it stuttered.
It was only weeks later the transmission started to act weird. Besides the stuttering I got unsteady power transfer in te low rpm ranges 1000-2000rpm.
It has to do with the O2 values. But the ECU will try to act on them. The ECU and the TCU are very linked. So the distorted engine performance sets the TCU off to act weird. Maybe if you can make the O2 problem go away it will act again normal. But me and my Indy tried everything. The tiptronic cars are not so suitable to tweak with performance mods like exhaust. Don't underestimate the complexity of the TCU it takes a whole lot of parameters
With manual cars cars no problems.
Going back to stock and all problems went away. You will find out.
My car is now a manual. My Indy transformed it into a manual.
07-20-2017, 08:52 PM
#17
Rennlist Member
07-22-2017, 04:49 AM
#19
yes ... but you have a manual. So you engage and switch gears yourself. With a tiptronic it will also set off the adaptation values of the TCU, eventually wearing out your torque converter and transmission.
07-24-2017, 06:16 PM
#20
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Silk, but what about the diagrams in this original post? My new FVD exhaust is wired like the stock diagram. So does this mean the shop connected the sensors wrong? How do I validate what the correct connections are, should it be like the FVD diagram?
09-06-2017, 10:24 PM
#21
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I feel your pain brotha. My car is sitting in the garage until banks 1 and 2 02 sensors arrive. unless you love projects and problem solving. Why not just take it to the dealer and let them handle it?
08-30-2018, 11:10 AM
#22
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Do you know if the brombacher exhaust is in the same factory exhaust location and has the same flange setup? I am considering putting non 200 cell cats on to see if that fixes the issue. Either fabspeed or magna flow. I don't have my original exhaust so trying to see if I can put them onto the brombacher exhaust.
