Nissan 370Z Forum
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Nissan 370Z Forum (http://www.the370z.com/)
-   Intake/Exhaust (http://www.the370z.com/intake-exhaust/)
-   -   Slow acceleration after intake and exhaust (http://www.the370z.com/intake-exhaust/44906-slow-acceleration-after-intake-exhaust.html)

b1adesofcha0s 11-05-2011 08:24 AM
I have the G3 intakes and Berk exhaust on my Z and definitely felt the increase in power and acceleration as soon as I installed them.

MBLAQ 11-05-2011 12:05 PM
well the acceleration feels heavier. but around 4k rpm it climbs faster, i can feel that. The sound how ever, doesnt seem very responsive? mmm thats how i would describe it, especially second gear (changing from 3k-3.5k in first to second) when i floor it, it just feels more 'heavy'.

The sensors on the Gen3, does it matter which way it goes in?

i do know the y pipe is 2.75inch, and rest is 2.5inch.

btw, how can i get it tuned? i am in australia. take it to dealer?

m4a1mustang 11-05-2011 12:12 PM
Make sure the sensors are oriented the same way they were in stock configuration.

henry0844 11-05-2011 03:10 PM
Quote:
Originally Posted by roplusbee (Post 1393181)
WHAT? Is this translated? If not, you need to use one.

To the OP:

Black residue coming from the exhaust is normal if you are running an upgraded exhaust system. The inside of my TDX is pretty dark. If you are smelling unburned fuel and your eyes are irritated after idling in place, I would agree that it's rich. Put it up on the dyno and you will know for sure
I'm going to get a tune from Stillen soon so I'll keep everybody updated once it happens. Stillen also thought it was wierd that my car ran worse when ambient temps r cold. could my fuel pump be bad, and unable to provide enough fuel for cold weather?

whoLEEoh 11-05-2011 04:28 PM
I know what u mean. For some reason my car only feels a bit faster with gears/g3/exhaust. Seemed like I was better off just stock with test pipes lol

henry0844 11-05-2011 05:49 PM
my car feels like its reving up as quick as it did stock but the power delivery feels as if my wheels r slipping or the clutch is not fully engaged. I used to feel a nice difference in power for the first 2000 miles on this setup but all of the sudden, overnight, it doesn't drive as well. almost like I got a bad tank of gas. that's what I thought it was at first so I let the tank run low and filled up at a different gas station and reset the ecu. 150 miles after reset and still no change. I'm confused......:ugh2:

henry0844 11-07-2011 11:31 PM
I also hear a little pinging below 3000 rpm when I give the car some gas. I noticed it today when my window was down. anybody got any ideas what could b causing this. I checked all intake fittings and they r all secure.

boo 11-08-2011 12:50 AM
Quote:
Originally Posted by MBLAQ (Post 1393410)
btw, how can i get it tuned? i am in australia. take it to dealer?
Try Tunehouse if u r in Sydney they are pretty good

Jordo! 11-08-2011 02:10 AM
Probably something isn't bolted down well, and the MAF sensors are moving around under load.

As a consequence, you will get MAF sensor misreads, which may be telling the ECU to add too much fuel.

That would correspond with being down on power and blowing out black smoke (i.e., unburnt fuel).

Other possibilities include damaged MAF sensors (unlikely) or a vacuum leak somewhere either before or immediately after the primary O2 (quite possible).

Quote:
Originally Posted by henry0844 (Post 1397039)
I also hear a little pinging below 3000 rpm when I give the car some gas. I noticed it today when my window was down. anybody got any ideas what could b causing this. I checked all intake fittings and they r all secure.
Whatever is causing the noise (hopefully not actual engine knock...) may be alerting the knock sesnor to pull timing.

henry0844 11-08-2011 05:23 PM
Quote:
Originally Posted by Jordo! (Post 1397096)
Probably something isn't bolted down well, and the MAF sensors are moving around under load.

As a consequence, you will get MAF sensor misreads, which may be telling the ECU to add too much fuel.

That would correspond with being down on power and blowing out black smoke (i.e., unburnt fuel).

Other possibilities include damaged MAF sensors (unlikely) or a vacuum leak somewhere either before or immediately after the primary O2 (quite possible).



Whatever is causing the noise (hopefully not actual engine knock...) may be alerting the knock sesnor to pull timing.
thanks for the info. like I stated before I'm going to go to Stillen and get an uprev tune and get the car looked over. just today I heard a kind of squeaky tick sound coming from the drivers side of the engine bay. increased in sound with Rpms. I really hope I don't need to go to nissan for warranty work.

Methodical4u 11-08-2011 06:15 PM
this isn't to make you feel stupid, but you didn't accidentally put regular gas or go to a different station than normal did you? You said you heard pinging so i'm just making sure.

henry0844 11-08-2011 08:59 PM
Quote:
Originally Posted by Methodical4u (Post 1398276)
this isn't to make you feel stupid, but you didn't accidentally put regular gas or go to a different station than normal did you? You said you heard pinging so i'm just making sure.
no worries, it's a valid question. I put nothing but 91 octane in my car. it was the same station I always go to. I changed stations after I thought I got bad gas. are the g3s supposed to be able to be moved around in the engine bay? I can move mine like they r just laying in the front bumper for support, if they are moving under load like jordo suggested would that cause the problem I'm having? I had Stillen install my intakes so if there is a problem with the install I'll take it back to them to have things done right.

Methodical4u 11-08-2011 09:36 PM
Quote:
Originally Posted by henry0844 (Post 1398513)
no worries, it's a valid question. I put nothing but 91 octane in my car. it was the same station I always go to. I changed stations after I thought I got bad gas. are the g3s supposed to be able to be moved around in the engine bay? I can move mine like they r just laying in the front bumper for support, if they are moving under load like jordo suggested would that cause the problem I'm having? I had Stillen install my intakes so if there is a problem with the install I'll take it back to them to have things done right.
as far as being able to move them I have no idea to be honest. I'm sure if Stillen put them in then they were done right.. I would imagine anyway.

henry0844 11-08-2011 09:55 PM
can somebody who has the g3's chime in here and tell me if their intakes are able to be moved around in the engine bay or if they are firmly in place. I would greatly appreciate it.

Methodical4u 11-09-2011 12:07 AM
I would imagine that unless they have some sort of mount somewhere that they would move at least some. If it's just the silicone that is holding the pipe in place then that would cause a lot more movement. Did you look over the DIY on the install on here and see if there are any other areas that secure the intake?

It's possible that it's like that to allow for engine movement when under load too.


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