Need some some guys - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

steve1040 · 03-24-2010, 07:09 PM

Im having a really annoying promblem with my S14. After the car warms it starts to sputter n losing power as if it were going to turn off (in fact sometimes it does) n the rpms bounce up and down. N it jolts back n forth while its sputtering. it does it while driving n while at idle. Some of the time it goes away but most of the time it just keeps doing it. Also it is gettin horrible mpg. Ive replaced the spark plugs, fuel pump, coolant temperature sensor, n fuel filter but nothing changed. I am completely stumped. Any help would be appreciated.

Ceepo · 03-24-2010, 07:15 PM

check all your couplers/vacuum lines for boost leaks...

steve1040 · 03-24-2010, 07:24 PM

Lol i should have put that im running the stock ka n its a 95. But i did check for vacuum lines for leaks n came up wit nada

dato · 03-25-2010, 01:04 AM

idle air control valve

Schassis707 · 03-25-2010, 01:54 AM

Clean out the iacv and if not it's the tps, or your timing if off, play around with the ignition timing with the tps unplugged of course. At first if you have problems with the cars idle and u unplug the tps and it stop, there u go that was the problem... My s13 has that problem right now and I just got a different tps sensor in the mail today(thanks traxx07) and will put it on 2moro and hopefully it's fixed

Schassis707 · 03-25-2010, 09:41 PM

So i put the new tps on and it fixed the same problem u had, just post wtb and u will get one soon.

miklos · 03-26-2010, 03:35 AM

What's a "some some guy"?

buentellomma · 03-26-2010, 05:21 AM

try cleaning your mafs

steve1040 · 03-29-2010, 09:37 AM

I cleaned out the maf already n also checked the tps n it was good. Im going to checkout the iacv next. Thanks. Oh n that some some guys thing was a typo.

Schassis707 · 04-03-2010, 02:47 AM

I started experiencing the problem again after changing my tps, and it's bc my maf is being moving around bc of the intake, so I got a few questions:
1)stock or aftermarket intake
2) if aftermarket is the maf in a position that it won't be able to move up down or whatever?
3) is your car running rich?
4) does the car sputter in certain rpm range?

03-24-2010, 07:09 PM	#1
steve1040 Join Date: Feb 2010 Location: Florida Age: 33 Posts: 8 Trader Rating: (0) Feedback Score: 0 reviews	Need some help guys Im having a really annoying promblem with my S14. After the car warms it starts to sputter n losing power as if it were going to turn off (in fact sometimes it does) n the rpms bounce up and down. N it jolts back n forth while its sputtering. it does it while driving n while at idle. Some of the time it goes away but most of the time it just keeps doing it. Also it is gettin horrible mpg. Ive replaced the spark plugs, fuel pump, coolant temperature sensor, n fuel filter but nothing changed. I am completely stumped. Any help would be appreciated.

03-24-2010, 07:15 PM	#2
Ceepo Nissanaholic! Join Date: Jan 2008 Location: Cedar City, Utah Posts: 2,007 Trader Rating: (9) Rides Gallery: Ceepo Feedback Score: 9 reviews	check all your couplers/vacuum lines for boost leaks... __________________ TW: #/f/cars-sale/390459...d9s-coils.html

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03-24-2010, 07:24 PM	#3
steve1040 Join Date: Feb 2010 Location: Florida Age: 33 Posts: 8 Trader Rating: (0) Feedback Score: 0 reviews	Lol i should have put that im running the stock ka n its a 95. But i did check for vacuum lines for leaks n came up wit nada

03-25-2010, 01:04 AM	#4
dato Zilvia Junkie Join Date: Jun 2009 Location: california Age: 34 Posts: 434 Trader Rating: (6) Feedback Score: 6 reviews	idle air control valve

03-25-2010, 01:54 AM	#5
Schassis707 Zilvia Addict Join Date: Mar 2010 Location: vacaville,CA Posts: 822 Trader Rating: (18) Feedback Score: 18 reviews	Clean out the iacv and if not it's the tps, or your timing if off, play around with the ignition timing with the tps unplugged of course. At first if you have problems with the cars idle and u unplug the tps and it stop, there u go that was the problem... My s13 has that problem right now and I just got a different tps sensor in the mail today(thanks traxx07) and will put it on 2moro and hopefully it's fixed

03-25-2010, 09:41 PM	#6
Schassis707 Zilvia Addict Join Date: Mar 2010 Location: vacaville,CA Posts: 822 Trader Rating: (18) Feedback Score: 18 reviews	So i put the new tps on and it fixed the same problem u had, just post wtb and u will get one soon.

03-26-2010, 03:35 AM	#7
miklos Zilvia Member Join Date: Sep 2006 Location: South Bay California Posts: 269 Trader Rating: (0) Feedback Score: 0 reviews	What's a "some some guy"?

03-26-2010, 05:21 AM	#8
buentellomma Zilvia Junkie Join Date: Mar 2010 Location: Goodyear AZ Age: 35 Posts: 480 Trader Rating: (6) Feedback Score: 6 reviews	try cleaning your mafs

03-29-2010, 09:37 AM	#9
steve1040 Join Date: Feb 2010 Location: Florida Age: 33 Posts: 8 Trader Rating: (0) Feedback Score: 0 reviews	I cleaned out the maf already n also checked the tps n it was good. Im going to checkout the iacv next. Thanks. Oh n that some some guys thing was a typo.

04-03-2010, 02:47 AM	#10
Schassis707 Zilvia Addict Join Date: Mar 2010 Location: vacaville,CA Posts: 822 Trader Rating: (18) Feedback Score: 18 reviews	I started experiencing the problem again after changing my tps, and it's bc my maf is being moving around bc of the intake, so I got a few questions: 1)stock or aftermarket intake 2) if aftermarket is the maf in a position that it won't be able to move up down or whatever? 3) is your car running rich? 4) does the car sputter in certain rpm range?