NPP fuse pull trick/result
10-02-2015, 02:18 PM
#261
Drifting
Thread Starter
Last edited by xp800; 10-02-2015 at 02:20 PM.
02-16-2016, 01:58 AM
#263
Burning Brakes
Ok- I'm a little late to this thread.
Waited 7 months to finally pull fuse 42 on my 2015 A8 convertible.
WOW!! What a difference.
Best free mod ever!
You can really tell a difference at lower RPMs in city driving- now it's always VERY throaty (esp when it used to be quiet in 4 cylinder mode).
Perfectly fine on the highway (doesn't drone much at all).
To those of you in doubt, it literally takes 30 seconds to do this mod.
Waited 7 months to finally pull fuse 42 on my 2015 A8 convertible.
WOW!! What a difference.
Best free mod ever!
You can really tell a difference at lower RPMs in city driving- now it's always VERY throaty (esp when it used to be quiet in 4 cylinder mode).
Perfectly fine on the highway (doesn't drone much at all).
To those of you in doubt, it literally takes 30 seconds to do this mod.
05-20-2016, 08:49 AM
#266
I pulled number 42 fuse on my 2016 Z.maybe they changed in in 2016?car started valves open like it always does,sounded mean.then after maybe 30 seconds to a minute they closed like the fuse was still in it.mine is a auto 8.in track mode on sound management setting,which should not matter if fuse is pulled.
05-20-2016, 09:01 AM
#267
Burning Brakes
Member Since: Mar 2014
Location: Greater Cincinnati Area
Posts: 1,140
Received 405 Likes
on
248 Posts
Are you certain the valves actually closed? My stingray will sound "mean" when its first started, but after about 30 seconds the Wait for help changes the air/fuel ratio (I think), and the sound mellows out a bit. This might be what you're noticing.
05-20-2016, 09:02 AM
#268
Drifting
The fuse for NPP valves is 42 for the 2016. You may be hearing the AFM valves close. You can not pull the fuse (#32) for these valves without the engine controller setting an error code.
Try putting the car in manual shift mode. This is the only way to keep the car from going into 4 cylinder mode. You should be loud all the time.
There is an aftermarket solution to keep the car from going to V4 and therefore closing the AFM valves. Search for "range technology" They sell a device with plugs into the OBD II port that keep the car in V8 mode at all times.
Try putting the car in manual shift mode. This is the only way to keep the car from going into 4 cylinder mode. You should be loud all the time.
There is an aftermarket solution to keep the car from going to V4 and therefore closing the AFM valves. Search for "range technology" They sell a device with plugs into the OBD II port that keep the car in V8 mode at all times.
I pulled number 42 fuse on my 2016 Z.maybe they changed in in 2016?car started valves open like it always does,sounded mean.then after maybe 30 seconds to a minute they closed like the fuse was still in it.mine is a auto 8.in track mode on sound management setting,which should not matter if fuse is pulled.
05-20-2016, 09:14 AM
#269
Drifting
You may be correct, the cold startup has a very aggressive sound. The sound goes away after the car gets just a bit of heat into the system. It will then start without the aggressive sound unless the car has completely cool.
05-20-2016, 09:29 AM
#270
Burning Brakes
I believe the cold start aggressive sound is due to the car running an intentionally rich fuel mixture for a brief period of time to put heat into the cats to reduce emissions.
05-20-2016, 11:01 AM
#271
Drifting
12-21-2016, 04:18 PM
#274
Melting Slicks
Member Since: Feb 2006
Location: Simi Valley California
Posts: 2,544
Received 123 Likes
on
81 Posts
St. Jude Donor '06-'07-'10, '15. '22-'23
