Slow acceleration after intake and exhaust

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

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......

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

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

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!

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

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

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.

11-05-2011, 08:24 AM	#16 (permalink)
b1adesofcha0s A True Z Fanatic Join Date: Jan 2011 Location: MD Posts: 40,963 Drives: HypeTrain Choo Choo! Rep Power: 141	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. __________________ Project: b1adeZmobile (2009 370Z) \| Uprev Tune by AAM Competition \| Berk Exhaust Project: b1adeZmobile 2.0 (2014 C7 Z51) \| Corsa Xtreme Exhaust

11-05-2011, 12:12 PM	#18 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	Make sure the sensors are oriented the same way they were in stock configuration. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

11-05-2011, 04:28 PM	#20 (permalink)
whoLEEoh Premium Member Join Date: Oct 2010 Location: Miami,FL Posts: 647 Drives: 2010 370z NISMO Rep Power: 15	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 __________________ 2013 Boss 302

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11-05-2011, 12:05 PM	#17 (permalink)
MBLAQ Base Member Join Date: Jun 2010 Location: Australia Posts: 68 Drives: silver 370z Rep Power: 14	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?

11-05-2011, 05:49 PM	#21 (permalink)
henry0844 Base Member Join Date: Oct 2010 Location: ventura Posts: 167 Drives: 10 370 base sprt pkg Rep Power: 14	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......

11-07-2011, 11:31 PM	#22 (permalink)
henry0844 Base Member Join Date: Oct 2010 Location: ventura Posts: 167 Drives: 10 370 base sprt pkg Rep Power: 14	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.

11-08-2011, 06:15 PM	#26 (permalink)
Methodical4u A True Z Fanatic Join Date: Jun 2011 Location: Maryland Posts: 1,393 Drives: 11 370 6mt pw w/sp Rep Power: 15	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.

11-08-2011, 09:55 PM	#29 (permalink)
henry0844 Base Member Join Date: Oct 2010 Location: ventura Posts: 167 Drives: 10 370 base sprt pkg Rep Power: 14	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.

11-09-2011, 12:07 AM	#30 (permalink)
Methodical4u A True Z Fanatic Join Date: Jun 2011 Location: Maryland Posts: 1,393 Drives: 11 370 6mt pw w/sp Rep Power: 15	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.