Loss in acceleration + throttle response ??

IcedZ · 07-09-2010, 07:54 AM

Quote:

Originally Posted by m4a1mustang

I'm thinking this might be the case. Though I believe the OP is stock...

I should probably put the factory intakes back on and see if I can tell a difference.

I'm having this issue... I'm stock except for K&N air filters. Points in common I notice:
1. I notice almost everybody is using red line oil (including me) - could be an issue??
2. Not sure about oil filters, but I also use K&N filter, and OP here said he was.
3. It's not intakes that are the issue, it's a mix of both. Could be air filters?
4. Only effects manual transmissions (from what I've gathered on the two threads)
5. Gas?

I'm going to try an ECU reset today and see what happens / how long it lasts. Then switch back to factory air filters if the problem doesn't go away or comes back.

MichaelM · 07-08-2010, 03:31 PM

Interesting as it relates to the Injen Intakes...I just order the Injen Intakes with the MR box.....I might just cancel......anybody else having problems with Intakes????

dlmartin81 · 07-08-2010, 03:48 PM

Quote:

Originally Posted by MichaelM

Interesting as it relates to the Injen Intakes...I just order the Injen Intakes with the MR box.....I might just cancel......anybody else having problems with Intakes????

I have stock intakes and have the same unpredictable hesitation issue. However, I've noticed it less and less. I wonder if it's the quality of fuel. For a while, I was always using WAWA or HESS. But about 1.5 months ago, I switched over the SUNOCO (only). It might be just a coincidence.

Zsteve · 07-08-2010, 04:20 PM

Quote:

Originally Posted by dlmartin81

I have stock intakes and have the same unpredictable hesitation issue. However, I've noticed it less and less. I wonder if it's the quality of fuel. For a while, I was always using WAWA or HESS. But about 1.5 months ago, I switched over the SUNOCO (only). It might be just a coincidence.

wierd. Just be sure to check your intake filters frequently as a less flowing filter will cause falling on the face when punching it. Maybe check the fule filter to see if its getting clogged. Also check to see if your plugs might have been fouled some.

fncrow · 06-27-2010, 12:07 PM

Wow, this happened to me too. I took my car in for its 2nd oil change and the very next day i felt the same sluggish behavior you describe. I mean i know one eventually gets used to their car and that after awhile it might not seem as quick as it once did but this was a very noticeable feeling.

I'll have to try to ECU reset thing when i get back to the states in a few months see if that helps it. I have just a little over 6k miles on mine too, and it didn't do this on my 1st oil change.

Cmike2780 · 06-27-2010, 02:01 PM

Is disconnecting the battery to reset the same as reseting with an OBD scanner. I didn't think unplugging the battery would reset the ecu.

Modshack · 06-27-2010, 03:10 PM

Quote:

Originally Posted by Cmike2780

Is disconnecting the battery to reset the same as reseting with an OBD scanner. I didn't think unplugging the battery would reset the ecu.

Fuel trims are maintained in a volatile memory. You need to de-power the ECU to c;ear them..

Red370 · 06-27-2010, 03:29 PM

hmmm... those of you experiencing this sluggishness.... your AC wouldnt happen to be on would it? just a thought.

I have the intakes and my car takes off like a champ. However, when the AC is on, the car shits its pants.

m4a1mustang · 06-27-2010, 09:13 PM

Quote:

Originally Posted by Red370

hmmm... those of you experiencing this sluggishness.... your AC wouldnt happen to be on would it? just a thought.

I have the intakes and my car takes off like a champ. However, when the AC is on, the car shits its pants.

AC on or off doesn't seem to make much of a difference. The car is just as sluggish down low with AC off as it is with AC on.

dope · 07-01-2010, 01:23 PM

Quote:

Originally Posted by m4a1mustang

AC on or off doesn't seem to make much of a difference. The car is just as sluggish down low with AC off as it is with AC on.

I've definitely noticed a difference like what was described with the AC on. It like wants to go but then falls on its face kind of like if the TC was kicking in.

cmmonte92 · 07-03-2010, 10:24 AM

Quote:

Originally Posted by dope

I've definitely noticed a difference like what was described with the AC on. It like wants to go but then falls on its face kind of like if the TC was kicking in.

Yep, same here.

It's even caused me to mis-time my shift into 2nd because it fell on it's face so bad from an attempted hard acceleration at a stoplight.

What's worse was, I was even under an over-pass, so my over-revving of the engine because of the missed gear got everyone's attention, all the way out to the gas stations on the corner! Yay! Look at me!

Now, if I wanna launch hard in my Z from a stoplight => AC and VDC are turned off.

j.arnaldo · 07-03-2010, 09:59 AM

W-e-i-r-d stuff. Hook her up to a Diagnostics Center Computer, dude!

6MT · 07-03-2010, 10:02 AM

More revs, dude!

Cmike2780 · 07-03-2010, 11:58 AM

I recently changed my stock air filters and found a lot of debri, leaves and dirt, in the air box. Those with stock intakes should check. The throttle response improved instantly.

Juleous · 07-03-2010, 04:15 PM

I was told by a knowlegeable NISSAN guy that if you don't use the correct oil (nissan ester) that the knock sensor will sense an issue and start to retard the power to the engine trying to compensate for this. Not sure if this is true but it sure sounds like it could be happening here, or does this sound like dealer dribble?

06-27-2010, 02:01 PM	#6 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 30	Is disconnecting the battery to reset the same as reseting with an OBD scanner. I didn't think unplugging the battery would reset the ecu. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

06-27-2010, 03:29 PM	#8 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 297	hmmm... those of you experiencing this sluggishness.... your AC wouldnt happen to be on would it? just a thought. I have the intakes and my car takes off like a champ. However, when the AC is on, the car shits its pants. coop370z likes this. __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs

07-03-2010, 10:02 AM	#13 (permalink)
6MT A True Z Fanatic Join Date: May 2009 Location: ITU Zone 2 Posts: 22,459 Drives: Reliant Robin Rep Power: 1791	More revs, dude! __________________ Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D

07-03-2010, 11:58 AM	#14 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 30	I recently changed my stock air filters and found a lot of debri, leaves and dirt, in the air box. Those with stock intakes should check. The throttle response improved instantly. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

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07-08-2010, 03:31 PM	#2 (permalink)
MichaelM Base Member Join Date: Apr 2010 Location: South Florida Posts: 50 Drives: 010 Nissan 370Z QAB Rep Power: 16	Interesting as it relates to the Injen Intakes...I just order the Injen Intakes with the MR box.....I might just cancel......anybody else having problems with Intakes????

06-27-2010, 12:07 PM	#5 (permalink)
fncrow Base Member Join Date: Jul 2009 Location: Miami Posts: 92 Drives: 370Z Rep Power: 17	Wow, this happened to me too. I took my car in for its 2nd oil change and the very next day i felt the same sluggish behavior you describe. I mean i know one eventually gets used to their car and that after awhile it might not seem as quick as it once did but this was a very noticeable feeling. I'll have to try to ECU reset thing when i get back to the states in a few months see if that helps it. I have just a little over 6k miles on mine too, and it didn't do this on my 1st oil change.

07-03-2010, 09:59 AM	#12 (permalink)
j.arnaldo Banned Join Date: Oct 2009 Location: Puerto Rico Posts: 937 Drives: Nissan 350Z, 2004 Rep Power: 0	W-e-i-r-d stuff. Hook her up to a Diagnostics Center Computer, dude!

07-03-2010, 04:15 PM	#15 (permalink)
Juleous Enthusiast Member Join Date: May 2010 Location: Nowhere Posts: 335 Drives: 370z Rep Power: 16	I was told by a knowlegeable NISSAN guy that if you don't use the correct oil (nissan ester) that the knock sensor will sense an issue and start to retard the power to the engine trying to compensate for this. Not sure if this is true but it sure sounds like it could be happening here, or does this sound like dealer dribble?