wont rev past 3k, not MAF problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

schizorazgriz · 02-25-2009, 02:05 PM

So my S14 sr20det (s13 chassis) wont go past 3k rpm in any gear including neutral. This would normally scream MAF problem but when i unplugged my MAF at idle the car idle changed and then died so there is nothing wrong with my MAF sensor. Is there anything else that i could check that might be the problem? BTW for those of you who are wondering the MAF is a stock s14 sr20det MAF

lok · 02-25-2009, 02:12 PM

Try unplugging the maf and then starting the car and see if it runs.

Then plug everything back in and check the ecu for codes.

discosteak · 02-25-2009, 02:23 PM

yeah its the MAF dawg

schizorazgriz · 02-25-2009, 04:37 PM

but if i unplug my maf while the car is on it dies... doesnt that mean there is nothing wrong with it?

i heard that the ecu has different modes it can be in. could it just not be in the right mode for driving? if so how do i change it and how do i check the engine codes. all i see is one little ass screw and no leds

Chernobyl · 02-25-2009, 04:40 PM

Your car should run fine with the MAFS unplugged, but will have a 2500-3000 rpm rev limit.

Try a known good MAFS and report back. Or check for codes like previous people said. I know I had a bad MAFS once and no codes showed up.

schizorazgriz · 02-25-2009, 05:14 PM

[quote=Chernobyl;2659945]Your car should run fine with the MAFS unplugged, but will have a 2500-3000 rpm rev limit.

Ok so what does it mean if my car dies when i unplug the mafs? does that mean that theres something else wrong with it?

lok · 02-25-2009, 07:48 PM

sometimes it will die when you unplug the maf.

that is why i said try and start it with it unplugged. it will put the car in limp mode.

have you hooked up your consult wire?

4x4le · 02-26-2009, 02:10 AM

Quote:

Originally Posted by lok

have you hooked up your consult wire?

ding ding ding! WINNAR

I dont know how people dont live without at least having a consult cable and Nissan datascan.....

drifter_for_life06 · 02-26-2009, 02:19 AM

maf seems shot as previously stated....AAP might be able to read your codes for you

Jus Skott · 02-26-2009, 05:11 AM

might be cause i literally just woke up like 5 minutes ago. but i thought a bad TPS might cause the same thing.
~skott "mornings suck" B

Z33dori · 02-26-2009, 11:08 AM

usually the maf

my tps went bad it would just buck like a mo-fo

but when m maf went bad it wouldn't rev past 3k or so

drifter_for_life06 · 02-26-2009, 05:54 PM

if the TPS goes bad I would think it should still go past 3k, just buck and carry on and do it slowly...? maybe im wrong...?

Autobacs · 02-26-2009, 07:38 PM

If your knock sensor is bad, it will do the something similar.

schizorazgriz · 02-27-2009, 01:51 PM

So we got a possibility of a bad MAF sensor, TPS sensor, and knock sensor.....

more symptoms. turbo will spool but no boost for that few hundred rpm before it tops at 3k. virtually NO throttle response. when im sitting at a stop light and hit the gas it sits for about ten seconds before stumbling up the rpm ladder super super slow.

d-magic · 02-28-2009, 05:04 PM

Another possibility would be bad ECU. Do you have check engine light?

tep3 · 03-01-2009, 07:58 PM

the same thing happend to my car check ur intercooler piping and couplers.

schizorazgriz · 03-01-2009, 11:37 PM

OK so i fixed the throttle response problem. My fuel pressure was extrmely high and it wa flooding like a mo-fo. fixed that but my rpm will only go up to a little over 3k like 3300. When im in neutral however it will go up to 3k, drop, go up to 3500, drop, and so on and so forth. This happens while my foot is on the gas and im not letting off the throttle at all. I hope that makes sense. is the main cause still looking like the MAF sensor? I noticed that their might be a connection problem with my pcm valve.... could this maybe be it?

910noskillz · 03-02-2009, 07:02 AM

still seems like the maf, i would find someone that you could swap with.....kinda sounds similar to a boost leak also

namfbroh · 05-04-2011, 09:04 PM

I hate to bump an old thread, but I'm having the exact same problem. I was sure it was the maf because the ECU was throwing code 12 - Faulty Air flow meter. Replaced it with a known working MAFS, and it still does this. It runs extremely rich, and it won't rev past 3k. Any ideas what the problem could be? I'm going to check the wiring to the MAFS, but I'm beside myself with what it could be.

Om1kron · 05-04-2011, 09:31 PM

Take the maf sensor out of the housing and clean it make sure the diodes don't have a layer of dirt on them. Still doesn't mean it hasn't shit the bed.

now when you say it wont rev past 3k, does that mean under a load or like sitting in neutral you cannot rev it over 3k?

OoAtreyuloO · 07-13-2011, 06:21 PM

old thread bump same fuking issue here =[

spoolin405 · 07-13-2011, 06:32 PM

its your MAF. borrow one of your friends or something. If its not that maybe its your ecu?? or wiring?

HAWAII · 07-13-2011, 09:46 PM

could be your piping also. might have a leak

Swifty · 07-13-2011, 09:50 PM

Ever try changing your fuel pump?

thizzen4 · 07-13-2011, 09:52 PM

check ur tps sensor mine did the sammeeeee thinggg

bookoo · 07-13-2011, 09:54 PM

More than likely, it's a wiring issue, then maf, then tps, then fuel.

*wangan_cruiser* · 07-25-2012, 02:32 PM

i am bumping this back because it seems theres no straight answer to fix this issue. i am having the same problem. instead of opening another thread ill just bump it.

h2v7 · 09-03-2012, 09:11 PM

PLEASE help bump

my car runs fine but after ten more or so of driving it wont let me rev past 3k

turn car off and back on and its fine just for a few minutes then wont rev past 3k again.

i have tried a few different MAFS and it does not change a thing.

4x4le · 09-03-2012, 10:14 PM

Quote:

Originally Posted by lok

have you hooked up your consult wire?

Quote:

Originally Posted by 4x4le

I dont know how people dont live without at least having a consult cable and Nissan datascan.....

Guys, get a consult cable and nissan datascan or have fun throwing parts at your car and asking the same question over and over again on zilvia.

If its not the maf it could be practically anything else. Youll save money the first time being able to figure out whats wrong. From then on youll also save money being able to get the right part the first time.

speedys · 09-21-2012, 11:41 PM

im not sure what is going on with my car, while driving my car doesnt let me go pass 3-4000 rpm, and when im about to stop the car almost turns off and idles back to 1,000 rpm.

any ideas on what it can be.

i tried unplugging the maf while the car was on to see if it would turn off , and it did, so im not sure what it can be.

02-25-2009, 02:05 PM	#1
schizorazgriz Join Date: Feb 2009 Location: riverside California Age: 34 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	wont rev past 3k, not MAF problem So my S14 sr20det (s13 chassis) wont go past 3k rpm in any gear including neutral. This would normally scream MAF problem but when i unplugged my MAF at idle the car idle changed and then died so there is nothing wrong with my MAF sensor. Is there anything else that i could check that might be the problem? BTW for those of you who are wondering the MAF is a stock s14 sr20det MAF

02-26-2009, 02:19 AM	#9
drifter_for_life06 Zilvia Addict Join Date: Sep 2005 Location: New Freedom, PA Age: 35 Posts: 775 Trader Rating: (6) Feedback Score: 6 reviews	maf seems shot as previously stated....AAP might be able to read your codes for you __________________ RPS13: +.020" 2871r 264's AEM EMS http://enjukuracing.com/#_l_4s

02-26-2009, 05:11 AM	#10
Jus Skott Zilvia Member Join Date: Dec 2006 Location: Morrisville Pa. Posts: 172 Trader Rating: (1) Feedback Score: 1 reviews	might be cause i literally just woke up like 5 minutes ago. but i thought a bad TPS might cause the same thing. ~skott "mornings suck" B __________________ Looking for yard parts, PM me.

02-26-2009, 11:08 AM	#11
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 35 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	usually the maf my tps went bad it would just buck like a mo-fo but when m maf went bad it wouldn't rev past 3k or so __________________

02-26-2009, 05:54 PM	#12
drifter_for_life06 Zilvia Addict Join Date: Sep 2005 Location: New Freedom, PA Age: 35 Posts: 775 Trader Rating: (6) Feedback Score: 6 reviews	if the TPS goes bad I would think it should still go past 3k, just buck and carry on and do it slowly...? maybe im wrong...? __________________ RPS13: +.020" 2871r 264's AEM EMS http://enjukuracing.com/#_l_4s

02-25-2009, 02:12 PM	#2
lok Zilvia Addict Join Date: Jul 2003 Location: Oklahoma Posts: 815 Trader Rating: (10) Feedback Score: 10 reviews	Try unplugging the maf and then starting the car and see if it runs. Then plug everything back in and check the ecu for codes.

02-25-2009, 02:23 PM	#3
discosteak Leaky Injector Join Date: Aug 2007 Location: Maryland Age: 38 Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	yeah its the MAF dawg

02-25-2009, 04:37 PM	#4
schizorazgriz Join Date: Feb 2009 Location: riverside California Age: 34 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	but if i unplug my maf while the car is on it dies... doesnt that mean there is nothing wrong with it? i heard that the ecu has different modes it can be in. could it just not be in the right mode for driving? if so how do i change it and how do i check the engine codes. all i see is one little ass screw and no leds

02-25-2009, 04:40 PM	#5
Chernobyl Zilvia FREAK! Join Date: May 2003 Location: Denver, CO Age: 41 Posts: 1,563 Trader Rating: (6) Feedback Score: 6 reviews	Your car should run fine with the MAFS unplugged, but will have a 2500-3000 rpm rev limit. Try a known good MAFS and report back. Or check for codes like previous people said. I know I had a bad MAFS once and no codes showed up.

02-25-2009, 05:14 PM	#6
schizorazgriz Join Date: Feb 2009 Location: riverside California Age: 34 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	[quote=Chernobyl;2659945]Your car should run fine with the MAFS unplugged, but will have a 2500-3000 rpm rev limit. Ok so what does it mean if my car dies when i unplug the mafs? does that mean that theres something else wrong with it?

02-25-2009, 07:48 PM	#7
lok Zilvia Addict Join Date: Jul 2003 Location: Oklahoma Posts: 815 Trader Rating: (10) Feedback Score: 10 reviews	sometimes it will die when you unplug the maf. that is why i said try and start it with it unplugged. it will put the car in limp mode. have you hooked up your consult wire?

02-26-2009, 07:38 PM	#13
Autobacs Leaky Injector Join Date: Oct 2003 Location: Washington Posts: 96 Trader Rating: (3) Feedback Score: 3 reviews	If your knock sensor is bad, it will do the something similar.

02-27-2009, 01:51 PM	#14
schizorazgriz Join Date: Feb 2009 Location: riverside California Age: 34 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	So we got a possibility of a bad MAF sensor, TPS sensor, and knock sensor..... more symptoms. turbo will spool but no boost for that few hundred rpm before it tops at 3k. virtually NO throttle response. when im sitting at a stop light and hit the gas it sits for about ten seconds before stumbling up the rpm ladder super super slow.

02-28-2009, 05:04 PM	#15
d-magic Leaky Injector Join Date: Oct 2008 Location: Northwest Florida Posts: 50 Trader Rating: (0) Feedback Score: 0 reviews	Another possibility would be bad ECU. Do you have check engine light?

03-01-2009, 07:58 PM	#16
tep3 Join Date: Jul 2008 Location: Tampa, FL Age: 36 Posts: 23 Trader Rating: (0) Feedback Score: 0 reviews	the same thing happend to my car check ur intercooler piping and couplers.

03-01-2009, 11:37 PM	#17
schizorazgriz Join Date: Feb 2009 Location: riverside California Age: 34 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	OK so i fixed the throttle response problem. My fuel pressure was extrmely high and it wa flooding like a mo-fo. fixed that but my rpm will only go up to a little over 3k like 3300. When im in neutral however it will go up to 3k, drop, go up to 3500, drop, and so on and so forth. This happens while my foot is on the gas and im not letting off the throttle at all. I hope that makes sense. is the main cause still looking like the MAF sensor? I noticed that their might be a connection problem with my pcm valve.... could this maybe be it?

03-02-2009, 07:02 AM	#18
910noskillz Join Date: Mar 2009 Location: Wilm NC Age: 34 Posts: 47 Trader Rating: (0) Feedback Score: 0 reviews	still seems like the maf, i would find someone that you could swap with.....kinda sounds similar to a boost leak also

05-04-2011, 09:04 PM	#19
namfbroh Leaky Injector Join Date: Dec 2010 Location: BC, Canada Posts: 103 Trader Rating: (4) Feedback Score: 4 reviews	I hate to bump an old thread, but I'm having the exact same problem. I was sure it was the maf because the ECU was throwing code 12 - Faulty Air flow meter. Replaced it with a known working MAFS, and it still does this. It runs extremely rich, and it won't rev past 3k. Any ideas what the problem could be? I'm going to check the wiring to the MAFS, but I'm beside myself with what it could be.

05-04-2011, 09:31 PM	#20
Om1kron Post Whore! Join Date: Sep 2004 Location: Granada Hills, CA Age: 43 Posts: 6,990 Trader Rating: (15) Feedback Score: 15 reviews	Take the maf sensor out of the housing and clean it make sure the diodes don't have a layer of dirt on them. Still doesn't mean it hasn't shit the bed. now when you say it wont rev past 3k, does that mean under a load or like sitting in neutral you cannot rev it over 3k? __________________ Wayne Edwards https://om1kron.blogspot.com

07-13-2011, 06:21 PM	#21
OoAtreyuloO Zilvia Junkie Join Date: Feb 2011 Location: Compton Age: 34 Posts: 340 Trader Rating: (1) Feedback Score: 1 reviews	old thread bump same fuking issue here =[

07-13-2011, 06:32 PM	#22
spoolin405 Join Date: Jun 2011 Location: oklahoma city Posts: 9 Trader Rating: (0) Feedback Score: 0 reviews	its your MAF. borrow one of your friends or something. If its not that maybe its your ecu?? or wiring?

07-13-2011, 09:46 PM	#23
HAWAII Zilvia Addict Join Date: Jun 2009 Location: Burbank,Ca Age: 48 Posts: 716 Trader Rating: (24) Feedback Score: 24 reviews	could be your piping also. might have a leak

07-13-2011, 09:50 PM	#24
Swifty Zilvia Junkie Join Date: Jun 2011 Location: New Orleans, LA Posts: 422 Trader Rating: (29) Feedback Score: 29 reviews	Ever try changing your fuel pump?

07-13-2011, 09:52 PM	#25
thizzen4 Zilvia FREAK! Join Date: May 2011 Location: tacoma 253 Age: 33 Posts: 1,170 Trader Rating: (22) Feedback Score: 22 reviews	check ur tps sensor mine did the sammeeeee thinggg

07-13-2011, 09:54 PM	#26
bookoo Zilvia Member Join Date: Oct 2009 Location: tennessee Age: 35 Posts: 276 Trader Rating: (2) Feedback Score: 2 reviews	More than likely, it's a wiring issue, then maf, then tps, then fuel.

07-25-2012, 02:32 PM	#27
wangan_cruiser kouki man Join Date: Apr 2006 Location: downtown oakland,ca Age: 39 Posts: 3,535 Trader Rating: (36) Feedback Score: 36 reviews	i am bumping this back because it seems theres no straight answer to fix this issue. i am having the same problem. instead of opening another thread ill just bump it.

09-03-2012, 09:11 PM	#28
h2v7 Nissanaholic! Join Date: Apr 2010 Location: san francisco, ohio Posts: 2,194 Trader Rating: (3) Feedback Score: 3 reviews	PLEASE help bump my car runs fine but after ten more or so of driving it wont let me rev past 3k turn car off and back on and its fine just for a few minutes then wont rev past 3k again. i have tried a few different MAFS and it does not change a thing.

09-21-2012, 11:41 PM	#30
speedys Join Date: Sep 2012 Location: Long Beach Age: 30 Posts: 1 Trader Rating: (0) Feedback Score: 0 reviews	my sr20det im not sure what is going on with my car, while driving my car doesnt let me go pass 3-4000 rpm, and when im about to stop the car almost turns off and idles back to 1,000 rpm. any ideas on what it can be. i tried unplugging the maf while the car was on to see if it would turn off , and it did, so im not sure what it can be.