Shifting weird after header install
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Pro
Joined: Apr 2010
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From: MD
Shifting weird after header install
Just installed Kooks long tubes on my '15. Battery was disconnected. Obviously it needs to be tuned but is there some sort of limp mode while the CEL is on for the O2s? the trans is shifting very sluggishly and weird. Also, my mode selector wont change the DIC screens anymore it will show that it's going into each mode but the screen isn't changing like it did before. Just thought this was strange just from a header install.
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Joined: Jan 2018
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From: Cedar Rapids Iowa
the selector switch still changes the modes but when you unhooked the battery the display goes back to sport mode on mine and i have to use the steering wheel buttons to re link the display to the selector position, it must revert to default
Safety Car
Joined: Mar 2004
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From: South Florida
Typical behavior for an untuned A8 car with headers. If you want the technical answer, head over to HPTuners forum and I'll explain it there. Short answer, get a tune.
Last edited by Internets_Ninja; Mar 26, 2019 at 09:48 PM.
Le Mans Master
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From: Atlanta GA
Le Mans Master
Joined: Oct 2014
Posts: 8,673
Likes: 2,728
From: Atlanta GA
Did you check the CEL to make sure it was for rear O2 sensors and not something else ?
Thanks
Dave
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From: MD
So there are a ton of posts about installing headers and guys running them without a tune , none report any issues with the way the trans shifts . I am watching this thread closely as I am about to install my headers ....
Did you check the CEL to make sure it was for rear O2 sensors and not something else ?
Thanks
Dave
Did you check the CEL to make sure it was for rear O2 sensors and not something else ?
Thanks
Dave
Le Mans Master
Joined: Oct 2014
Posts: 8,673
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From: Atlanta GA
Dave
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Thread Starter
Pro
Joined: Apr 2010
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From: MD
Safety Car
Joined: Mar 2004
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From: South Florida
I don't care who did what, what anyone reads on the internet, whos buddy did it this way or that way, or how fast someone thinks their car is untuned. If you mod your car you will always have better drivability and more power tuned than without tuning. Not to mention the people with mods but without tunes have never looked at torque logs of the car when stock and after the mods and untuned. Seeing how the engine behaves between the two might change some peoples minds.
Le Mans Master
Joined: Oct 2014
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From: Atlanta GA
Trinpintaz , point taken , it's just when the OP said he felt like it was in some sort of LIMP mode it sounded like something else was going on .
Thanks for the detailed explanation!
Dave
Thanks for the detailed explanation!
Dave
Safety Car
Joined: Mar 2004
Posts: 4,048
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From: South Florida