I cannot figure this out

smoothtransit · 06-06-2015, 01:41 PM

I purchased my car approximately 7 months ago with 48k miles. From the get go ive always felt like the car was quick, yet it felt so much slower than the specs of the car. i figured that it was just in my head and that there was nothing wrong. Except last night, i started up my car and all of a sudden it felt like i was driving a brand new car... The gas pedal was much more reactive, i was going through gears much quicker, and was practically snapping my neck through second gear

. Normally this would be a great thing, except that it highlights that there is a problem in my car somewhere. I'm usually somewhat knowledgeable with my cars but this time, I literally don't know where to start. Does anyone have any insight or suggestions on the matter?

to add; it sounds messed up, but for the first time im actually in love with my car... I want to keep it this way obviously. So any help would be greatly appreciated.

Thank in advance

Spooler · 06-06-2015, 01:58 PM

Throttle lag is a common issue. Do some research on it. I don't notice it but I probably always have had it in the hot climate I am in.

smoothtransit · 06-06-2015, 02:08 PM

Quote:

Originally Posted by Spooler

Throttle lag is a common issue. Do some research on it. I don't notice it but I probably always have had it in the hot climate I am in.

Thats what i assumed since i purchased my car, but literally after 7 months my car had a huge gain of power at complete random yesterday.

Spooler · 06-06-2015, 02:50 PM

Mine actually feels like a dog now since it has turned hot, especially in the low gears.

smoothtransit · 06-06-2015, 03:05 PM

Weird, mine did the exact opposite. I don't understand what's up with it

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Jordo! · 06-06-2015, 03:47 PM

Its possible there were some very wonky fuel trims that took a while to sort themselves out. It's also possible some crud was caked on the MAF's that finally flew off.

Finally, different fuel mixtures, which vary a bit by season, can affect things a bit.

Either way, sounds like a good problem to have

POS VETT · 06-06-2015, 05:01 PM

Butt dyno is highly inconsistent.

phunk · 06-06-2015, 05:26 PM

^^ There is really no where for this to go until you get it on a dyno.

smoothtransit · 06-07-2015, 05:09 AM

Quote:

Originally Posted by POS VETT

Butt dyno is highly inconsistent.

I agree that butt dyno is highly inconsistent but you have to understand that ive been driving my car for 7 months. I know how it feels and if you felt this difference you would see how dramatic it is. Im not talking slight differences, i mean it literally feels like my car jumped around 50-75hp. Passengers have even noticed the difference.

smoothtransit · 06-07-2015, 05:09 AM

Quote:

Originally Posted by phunk

^^ There is really no where for this to go until you get it on a dyno.

I agree, but im afraid a dyno will only show the power now, not the power before this occured.

DOOMMONKEY777 · 06-07-2015, 11:19 AM

Quote:

Originally Posted by Jordo!

It's also possible some crud was caked on the MAF's that finally flew off.

LMFAO....that just made my day, so rare, but true.

smoothtransit · 06-08-2015, 07:02 PM

Anyone got any more input on this?

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smoothtransit · 06-08-2015, 07:07 PM

I should also input that I ran my car to almost empty before filling up (which I rarely ever do) the next day my car had this gain of power. As I said my car used to feel like 220-250hp now it feels like what it should.

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phunk · 06-08-2015, 08:38 PM

No useful information here to even speculate. Next time its slow, take it in for service.

pbs370z · 06-13-2015, 06:21 PM

well, could be so many different things. I like to start with cleaning the MAFs. when they get dirty they can make your car run finicky.

06-06-2015, 01:41 PM	#1 (permalink)
smoothtransit Base Member Join Date: Dec 2014 Location: Seattle Posts: 63 Drives: 09 370 BS 6mt Rep Power: 10	I cannot figure this out I purchased my car approximately 7 months ago with 48k miles. From the get go ive always felt like the car was quick, yet it felt so much slower than the specs of the car. i figured that it was just in my head and that there was nothing wrong. Except last night, i started up my car and all of a sudden it felt like i was driving a brand new car... The gas pedal was much more reactive, i was going through gears much quicker, and was practically snapping my neck through second gear. Normally this would be a great thing, except that it highlights that there is a problem in my car somewhere. I'm usually somewhat knowledgeable with my cars but this time, I literally don't know where to start. Does anyone have any insight or suggestions on the matter? to add; it sounds messed up, but for the first time im actually in love with my car... I want to keep it this way obviously. So any help would be greatly appreciated. Thank in advance Last edited by smoothtransit; 06-06-2015 at 01:43 PM.

06-06-2015, 03:47 PM	#6 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	Its possible there were some very wonky fuel trims that took a while to sort themselves out. It's also possible some crud was caked on the MAF's that finally flew off. Finally, different fuel mixtures, which vary a bit by season, can affect things a bit. Either way, sounds like a good problem to have DOOMMONKEY777 and smoothtransit like this. __________________ Enjoy it. Destroy it.

06-06-2015, 05:01 PM	#7 (permalink)
POS VETT Track Member Join Date: Apr 2015 Location: Columbus OH Posts: 612 Drives: Z34\|C4LT4\|C6Z06\|V25 Rep Power: 3366	Butt dyno is highly inconsistent. Jordo! likes this.

06-06-2015, 05:26 PM	#8 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	^^ There is really no where for this to go until you get it on a dyno. Jordo! and jrb55gh like this. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

06-08-2015, 08:38 PM	#14 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	No useful information here to even speculate. Next time its slow, take it in for service. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

06-06-2015, 01:58 PM	#2 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,792 Drives: 2013 Nismo 370z Rep Power: 2684392	Throttle lag is a common issue. Do some research on it. I don't notice it but I probably always have had it in the hot climate I am in.

06-06-2015, 02:50 PM	#4 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,792 Drives: 2013 Nismo 370z Rep Power: 2684392	Mine actually feels like a dog now since it has turned hot, especially in the low gears.

06-06-2015, 03:05 PM	#5 (permalink)
smoothtransit Base Member Join Date: Dec 2014 Location: Seattle Posts: 63 Drives: 09 370 BS 6mt Rep Power: 10	Weird, mine did the exact opposite. I don't understand what's up with it Sent from my iPhone using Tapatalk

06-08-2015, 07:02 PM	#12 (permalink)
smoothtransit Base Member Join Date: Dec 2014 Location: Seattle Posts: 63 Drives: 09 370 BS 6mt Rep Power: 10	Anyone got any more input on this? Sent from my iPhone using Tapatalk

06-08-2015, 07:07 PM	#13 (permalink)
smoothtransit Base Member Join Date: Dec 2014 Location: Seattle Posts: 63 Drives: 09 370 BS 6mt Rep Power: 10	I should also input that I ran my car to almost empty before filling up (which I rarely ever do) the next day my car had this gain of power. As I said my car used to feel like 220-250hp now it feels like what it should. Sent from my iPhone using Tapatalk

06-13-2015, 06:21 PM	#15 (permalink)
pbs370z Base Member Join Date: Jul 2010 Location: Near Portland, OR Posts: 92 Drives: '10 370Z, Sport Pkg Rep Power: 3370	well, could be so many different things. I like to start with cleaning the MAFs. when they get dirty they can make your car run finicky. __________________ '10 Z, Sport Pkg 6 MT, Stillen Brake Cooler, Z1 Oil Cooler w/Setrab 25 row/Mocal T-stat, Southbend Clutch w/light wt Flywheel.

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