Loss in acceleration + throttle response ??

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.

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!

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.

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?

m4a1mustang · 07-03-2010, 08:03 PM

It's always the simplest of things.

Get some CRC MAF cleaner and hit your sensors. Did it today and it helped a lot. The car obviously is not very torquey down low, but it made a pretty big difference in overall responsiveness and pep in the lower RPMs (read street driving).

I'm thinking a dyno tune to optimize A/F ratios with the intakes would do wonders for the car...

m4a1mustang · 07-03-2010, 08:06 PM

Quote:

Originally Posted by Juleous

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?

Not quite sure why the engine oil would cause an issue with the knock sensor. Doesn't make any sense to me.

If that were the case I think we'd have a lot more discussion on poor performance because it seems like more than 50% of board members are running something other than the Nissan Ester.

dlmartin81 · 07-03-2010, 10:21 PM

Quote:

Originally Posted by m4a1mustang

It's always the simplest of things.

Get some CRC MAF cleaner and hit your sensors. Did it today and it helped a lot. The car obviously is not very torquey down low, but it made a pretty big difference in overall responsiveness and pep in the lower RPMs (read street driving).

I'm thinking a dyno tune to optimize A/F ratios with the intakes would do wonders for the car...

Hmmm....good tip. I think I'll give that a shot. It's only $9 on amazon, plus free shipping. Do you know if Pepboys/Autozone/etc. carries it?

m4a1mustang · 07-03-2010, 10:26 PM

Quote:

Originally Posted by dlmartin81

Hmmm....good tip. I think I'll give that a shot. It's only $9 on amazon, plus free shipping. Do you know if Pepboys/Autozone/etc. carries it?

I bought a can at AutoZone... can't remember what I paid for it, though. I also picked up a can of PB Blaster just cause.

06-27-2010, 02:01 PM	#17 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 28	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	#19 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 295	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	#23 (permalink)
6MT A True Z Fanatic Join Date: May 2009 Location: ITU Zone 2 Posts: 22,459 Drives: Reliant Robin Rep Power: 1789	More revs, dude! __________________ Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D

07-03-2010, 11:58 AM	#25 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 28	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]

07-03-2010, 08:03 PM	#27 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	It's always the simplest of things. Get some CRC MAF cleaner and hit your sensors. Did it today and it helped a lot. The car obviously is not very torquey down low, but it made a pretty big difference in overall responsiveness and pep in the lower RPMs (read street driving). I'm thinking a dyno tune to optimize A/F ratios with the intakes would do wonders for the car... ped likes this. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

06-27-2010, 12:07 PM	#16 (permalink)
fncrow Base Member Join Date: Jul 2009 Location: Miami Posts: 92 Drives: 370Z Rep Power: 15	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	#22 (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	#26 (permalink)
Juleous Enthusiast Member Join Date: May 2010 Location: Nowhere Posts: 335 Drives: 370z Rep Power: 14	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?

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