Loss in acceleration + throttle response ??

Zsteve · 07-08-2010, 03:29 PM

Quote:

Originally Posted by m4a1mustang

I admit, puny was an overstatement.

I just find the car's behavior below 4,000 RPM to be quite interesting. It has the power to GO, and does initially, but something happens and it stops... then a few seconds later it GOES. I wonder if a tune would take care of it.

I have the AAM tune and if I jump on the car from a stop and keep on it I dont feel like it falls on its face in the 3K to 4K range. I think our cars could just use some more low end TQ overall.

Now if Im driving normal and the rpms are low and I stomp on it it does take a second to kick in but most cars are like that. If I know I might need to jump on it I put the car into manual mode and ensure the rpms are around 3k already then jump on it.

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.

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.

Zsteve · 07-09-2010, 09:22 AM

try some MAF sensor cleaner on the sensors and see how it does. You can get it at any car store.

IcedZ · 07-09-2010, 09:46 AM

Quote:

Originally Posted by Zsteve

try some MAF sensor cleaner on the sensors and see how it does. You can get it at any car store.

Did yesterday. Helps a little, but as soon as it warms up, the problem is still there.
I'm going to try Sunoco Gas. There is only one station in town, but I'll go there for the next few fill-ups.

dlmartin81 · 07-09-2010, 02:13 PM

I took out my air filters today and they were a little dirty, but not extremely. Anyhow, after cleaning them, I noticed a difference in responsiveness. I was noticeably better.

Oh.....there was also a leaf stuck in the left intake duct.

IcedZ · 07-09-2010, 02:56 PM

Quote:

Originally Posted by dlmartin81

I took out my air filters today and they were a little dirty, but not extremely. Anyhow, after cleaning them, I noticed a difference in responsiveness. I was noticeably better.

Oh.....there was also a leaf stuck in the left intake duct.

As stated in the other thread, it's not a lack of response. This car needs RPM's; that's understood. It's a weird jerk of power at ~3k RPM. There is almost zero response at the start, then at about 3k RPM, you get pinned back in your seat. It's not smooth at all. This doesn't happen to me until I've driven for about 20 mins. At first it's fine, it's a lot smoother. But it seems after I reach normal operating temp, it gets lagged.

ishthemienguy · 07-09-2010, 03:18 PM

Quote:

Originally Posted by IcedZ

As stated in the other thread, it's not a lack of response. This car needs RPM's; that's understood. It's a weird jerk of power at ~3k RPM. There is almost zero response at the start, then at about 3k RPM, you get pinned back in your seat. It's not smooth at all. This doesn't happen to me until I've driven for about 20 mins. At first it's fine, it's a lot smoother. But it seems after I reach normal operating temp, it gets lagged.

Nissan VTEC Kicked in YO! sorry just had to say that...

dlmartin81 · 07-09-2010, 03:45 PM

Quote:

Originally Posted by IcedZ

As stated in the other thread, it's not a lack of response. This car needs RPM's; that's understood. It's a weird jerk of power at ~3k RPM. There is almost zero response at the start, then at about 3k RPM, you get pinned back in your seat. It's not smooth at all. This doesn't happen to me until I've driven for about 20 mins. At first it's fine, it's a lot smoother. But it seems after I reach normal operating temp, it gets lagged.

I hear what you're saying. I had those symptoms as well. However, I haven't noticed them as much (or at all) as of 1.5 months ago after I switched to a better fuel (Sunoco). Also, it was noticeably much more responsive in lower RPMs after I cleaned the air filters. It could be a combination of both things....better fuel and intake air flow.

I think my next mod will be CAI......probably STILLEN's because of their filter placement. I don't want to risk sucking up water on rainy days, as it would be more prone with the Injens or AEMs.

Zsteve · 07-09-2010, 07:22 PM

try some fuel additive to increase the octane and see if that helps. If so then you know it was the gas.

taikien · 07-11-2010, 01:08 AM

Turn off the vdc and try it.i noticed a difference when i tried mine.

fullmonty · 07-11-2010, 01:10 AM

Quote:

Originally Posted by taikien

Turn off the vdc and try it.i noticed a difference when i tried mine.

Its worth a try but I don't think its the traction control

IcedZ · 07-11-2010, 07:36 AM

Quote:

Originally Posted by taikien

Turn off the vdc and try it.i noticed a difference when i tried mine.

I always turn mine off anyway.

07-09-2010, 09:22 AM	#51 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	try some MAF sensor cleaner on the sensors and see how it does. You can get it at any car store. __________________ 2010 LS3 C6 Silver coupe corvette

07-09-2010, 02:13 PM	#53 (permalink)
dlmartin81 Track Member Join Date: Dec 2008 Location: Chalfont, PA Age: 43 Posts: 923 Drives: 09 370Z Rep Power: 608	I took out my air filters today and they were a little dirty, but not extremely. Anyhow, after cleaning them, I noticed a difference in responsiveness. I was noticeably better. Oh.....there was also a leaf stuck in the left intake duct. __________________ Dan F.I. SS CBE 18-R \|\| Llumar 40% tint

07-09-2010, 07:22 PM	#57 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	try some fuel additive to increase the octane and see if that helps. If so then you know it was the gas. __________________ 2010 LS3 C6 Silver coupe corvette

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07-08-2010, 03:31 PM	#47 (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????

07-11-2010, 01:08 AM	#58 (permalink)
taikien Base Member Join Date: May 2010 Location: dallas Posts: 10 Drives: 370z Rep Power: 16	Turn off the vdc and try it.i noticed a difference when i tried mine.