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

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > S Chassis

S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


Reply
 
Thread Tools Display Modes
Old 06-21-2011, 02:20 AM   #1
oung
Leaky Injector
 
Join Date: Feb 2010
Location: fresno, CA
Age: 34
Posts: 90
Trader Rating: (0)
oung is an unknown quantity at this point
Feedback Score: 0 reviews
96 240sx bucking, hesitation and slow acceleration when i step on the gas

hey guys/gals anyone with any knowledge on this issue or experience with this problem please help me out here...problem is when i drive my car wether its cold or warm i have the same issue when i completely floor the gas pedal, it pulls back and hesitates like its holding back and i can smell exhaust gases if my windows are rolled down...smells very rich.... and doesn't really accelerate at all but if i only slightly give it gas it will drive just fine....i've replaced numerous things on this vehicle but am running out of options...can anyone give me feedback to help me solve this?

things i've replaced/checked:

300zx fuel filter
distributor cap and rotor
spark plugs
spark plug wires
tps (also adjusted to right settings)
Cam Timing set to OEM specs
2.5" straight pipe from exhaust manifold to R34 skyline exhaust
checked fuel injectors all seem fine...

things i haven't changed:

MAF
Coolant temp sensor
O2 Sensor
Knock Sensor

I'm planning on replacing the coolant temp tomorrow but just wanted to see if anyone can pinpoint exactly what the issue is?? oh and also I'm ordering a new knock sensor too....
oung is offline   Reply With Quote
Sponsored Links
Old 06-24-2011, 01:06 AM   #2
ShimiBoi
Zilvia Member
 
ShimiBoi's Avatar
 
Join Date: Feb 2009
Location: Hawthorne
Posts: 216
Trader Rating: (9)
ShimiBoi is an unknown quantity at this point
Feedback Score: 9 reviews
a bad maf, o2, and coolant temp would make your car run overly rich. it could also be something wrong with your ecu. im not 100% sure if these would cause your problem but for sure any one of the 3 things i mentioned above will make your car run too rich. on a seperate note, unless your car is turbo or you are running a higher pressure fuel setting/bigger injectors you dont need a 300zx fuel filter (just my ). gluck with your problem.
ShimiBoi is offline   Reply With Quote
Old 06-24-2011, 06:37 AM   #3
240mike1022
Zilvia Member
 
240mike1022's Avatar
 
Join Date: Dec 2009
Location: NYC
Age: 30
Posts: 245
Trader Rating: (3)
240mike1022 is an unknown quantity at this point
Feedback Score: 3 reviews
Im going thru a similar issue with my 95 it was once auto than i converted it to a 5 speed a stock ka I cbchanged my wires and plugs and it may be in my head but it does it less often since my issue doesn't occur all the time but nonetheless I felt it hesistate for like 2 secs than start accelerating.. also I feel like im at a loss of power compared to my old 93 ka hatch...and I doubt it but idk if its cuz I came from a 93 ka to a b20 swapped civic than to the 95 that I feel like im not getting the power I feel my ka has???
__________________
240mike1022 is offline   Reply With Quote
Old 06-24-2011, 09:14 AM   #4
Sezio
Zilvia Addict
 
Join Date: Apr 2010
Location: Los Angeles
Age: 34
Posts: 685
Trader Rating: (12)
Sezio is an unknown quantity at this point
Feedback Score: 12 reviews
Send a message via AIM to Sezio
s13 KA's are much stronger than s14
Sezio is offline   Reply With Quote
Old 06-25-2011, 12:40 PM   #5
Swifty
Zilvia Junkie
 
Swifty's Avatar
 
Join Date: Jun 2011
Location: New Orleans, LA
Posts: 422
Trader Rating: (29)
Swifty is an unknown quantity at this point
Feedback Score: 29 reviews
Weak fuel pump maybe had a similar problem with a buddies 240 had no power at all. After we changed the fuel pump it was good to go.

Just giving some ideas might be wrong tho.
Swifty is offline   Reply With Quote
Old 06-25-2011, 02:52 PM   #6
iamtheyi
Nissanaholic!
 
iamtheyi's Avatar
 
Join Date: Mar 2008
Location: Brea, CA
Age: 30
Posts: 2,252
Trader Rating: (21)
iamtheyi is an unknown quantity at this point
Feedback Score: 21 reviews
If your check engine light is not on, it's not the MAF or the Knock. I would clean the maf anyway for kicks. But yes, a lot of people, who didn't throw a code, have had problems with the fuel pump starting to go bad and replacing that. You changed all the spark stuff so I would guess it's a fuel issue.

Breaking it down, no MIL means fuel. MIL means probably a sensor and you should scan and post up your findings.
__________________

iamtheyi is offline   Reply With Quote
Old 06-25-2011, 11:08 PM   #7
818 ZENKI
Zilvia Member
 
818 ZENKI's Avatar
 
Join Date: Jun 2009
Location: Killa Cali
Age: 29
Posts: 207
Trader Rating: (3)
818 ZENKI is an unknown quantity at this point
Feedback Score: 3 reviews
I had this on my redtop sr...check to see if your maf connector is loose, clean your maf, clean your iacv, check for vacuum leaks, clean your throttle body, and double check your tps.
__________________
WTB: S14 Wiper motor and S15 HLSD w/ Shafts
It's always broken!
818 ZENKI is offline   Reply With Quote
Old 06-25-2011, 11:34 PM   #8
sixtyfiveolds
 
Join Date: Oct 2007
Location: Oxnard, CA
Age: 32
Posts: 42
Trader Rating: (0)
sixtyfiveolds is on a distinguished road
Feedback Score: 0 reviews
im goin thru a similar issue on my '93 vert. engine was replaced recently from another s13. it would get like 28 mpg but have no power at all. running lean. then i changed the fuel filter and thing weighed like 10 pounds probably the original factory one after 140k miles haha. that plus all the fuel hose was cracked from the tank up til the filter. pressure buildup!

small fix. but it still has no balls and pings on light throttle, even when its on a cold morning right after start up. did all the plugs wires cap rotor knock sensor & maf. still trying to figure this thing out.

all i can think of is a bad coolant temp sensor for the ecu makin it rich to the ecu, but evened out with a plugged fuel filter over time lol. dirty injectors could be a result too.
sixtyfiveolds is offline   Reply With Quote
Old 06-25-2011, 11:39 PM   #9
Swifty
Zilvia Junkie
 
Swifty's Avatar
 
Join Date: Jun 2011
Location: New Orleans, LA
Posts: 422
Trader Rating: (29)
Swifty is an unknown quantity at this point
Feedback Score: 29 reviews
^ever changed the fuel pump?
Swifty is offline   Reply With Quote
Old 06-26-2011, 11:09 AM   #10
AutechKouki
Zilvia Addict
 
AutechKouki's Avatar
 
Join Date: Jan 2011
Location: SoCal
Age: 29
Posts: 669
Trader Rating: (43)
AutechKouki has a spectacular aura aboutAutechKouki has a spectacular aura aboutAutechKouki has a spectacular aura aboutAutechKouki has a spectacular aura aboutAutechKouki has a spectacular aura aboutAutechKouki has a spectacular aura about
Feedback Score: 43 reviews
Quote:
Originally Posted by Swifty View Post
Weak fuel pump maybe had a similar problem with a buddies 240 had no power at all. After we changed the fuel pump it was good to go.

Just giving some ideas might be wrong tho.
I second this. Also make sure the gaskets on the tank are all good, including hoses. Low fuel pressure causes hesitation.
AutechKouki is offline   Reply With Quote
Old 06-26-2011, 11:33 AM   #11
RickyS13.
Leaky Injector
 
RickyS13.'s Avatar
 
Join Date: Sep 2010
Location: Phoenix
Posts: 100
Trader Rating: (2)
RickyS13. is an unknown quantity at this point
Feedback Score: 2 reviews
check the wiring for your o2 sensor as well, i have a redtop with a blacktop ecu and mine would buck at half throttle. If you depress it slightly nothing happens right? It ended up being that my wiring was wrong its like 2 or 3 wires you splice, after you replace your o2 if it still does this, unplug it and see if it still happens.
RickyS13. is offline   Reply With Quote
Old 07-09-2011, 06:52 PM   #12
oung
Leaky Injector
 
Join Date: Feb 2010
Location: fresno, CA
Age: 34
Posts: 90
Trader Rating: (0)
oung is an unknown quantity at this point
Feedback Score: 0 reviews
ok so i had the codes run thru at pep boys and came up 4 code issues so i think my CEL isn't hooked up or the bulbs out....

Knock Sensor
IAVC
O2 heater temp sensor
and a leak from the canister from behind my rear passenger wheel...which i found out my tire rubbed the hose open so not really an issue for me...

i replaced the knock sensor but am having issues putting it back on...its really pissing me off and i already lost the knock sensor bolt somewhere and had to order a new one....question is if i have it plugged in and not attached to the block, its still going to have the issue isn't it? my assumption is that its mainly the knock sensor causing this putting my ecu into fail safe mode from what i've read
oung is offline   Reply With Quote
Old 07-09-2011, 06:53 PM   #13
oung
Leaky Injector
 
Join Date: Feb 2010
Location: fresno, CA
Age: 34
Posts: 90
Trader Rating: (0)
oung is an unknown quantity at this point
Feedback Score: 0 reviews
i have the o2 sensor error because i did not make a new o2 sensor bung when i went straight pipe
oung is offline   Reply With Quote
Old 07-09-2011, 07:16 PM   #14
zerodameaon
Post Whore!
 
zerodameaon's Avatar
 
Join Date: May 2009
Location: Bay Area CA, Sutherlin OR
Age: 33
Posts: 3,289
Trader Rating: (3)
zerodameaon is an unknown quantity at this point
Feedback Score: 3 reviews
Change your EGI relays. My EGI pump relay went bad and would cause this problem. Changed it out with one from the junk yard, boom no problem.
__________________
Quote:
Originally Posted by MrMigs View Post
That's a one-way trip to understeer land...
Quote:
Originally Posted by BKdaMoRoN View Post
Maybe you should petition the retards who are paying 5k for an S13.

Need to adjust your idle?
http://zilvia.net/f/s-chassis/395413...-pictures.html
zerodameaon is offline   Reply With Quote
Old 07-09-2011, 10:06 PM   #15
oung
Leaky Injector
 
Join Date: Feb 2010
Location: fresno, CA
Age: 34
Posts: 90
Trader Rating: (0)
oung is an unknown quantity at this point
Feedback Score: 0 reviews
well i looked under my hood and the only thing i saw that said EGI was a 7.5amp fuse and the looked like it wasn't blown so if you can guide me to where this EGI Relay is that would be great...!
oung is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 01:25 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™