acceleration bogging, help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Illestdrift · 08-16-2007, 08:04 PM

So the problem is..

When driving normally, my car idles, and accelerates pretty much normal. but when i get on the gas a little, when it hits around 25-3k it stops accelerating all together, but if i lift off and hit the gas again, its normal.
could it be maf? 02? i have no idea i searched, but nothing was very helpful. im omw to get a new fuel filter to see if thats it, but if that isnt, im fresh out.

Any help would be great!!
]Thanks all

9tb

95240s14 · 08-16-2007, 08:15 PM

what engine? mods?

Illestdrift · 08-16-2007, 09:56 PM

sorry. Stock 92 ka24de, no mods at all

MavericStephenc · 08-16-2007, 10:01 PM

could it be electrical....like maf?

edit:check and clean the iacv might help

kafanylovesme · 08-16-2007, 10:08 PM

i have the same exact problem....
except i have a kae and no mods but exhaust.
and my idle just drops way down low like 300ish at random times.
i too searched and i found that it could be EGR, which is why my check engine light is on, IACV, MAF, and other stuff. but yeah any other further help is good also.

Illestdrift · 08-16-2007, 10:09 PM

maf is a possibility, but i doubt it seeing as it idles, and accelerates normally aside from when i floor it, but my buddy is coming over in a little bit, and im gonna borrow his to see if it is the maf, but has anyone else on here had this problem?

Illestdrift · 08-16-2007, 10:11 PM

egr huh, is yours only under hard acceleration too? what is the exact function of the egr?

MavericStephenc · 08-16-2007, 10:25 PM

egr (exhaust gas return) simply stated takes exhaust gasses from well the exhaust and reroutes them back through the engine to lower emissions. If i happen to be wrong please correct me

Illestdrift · 08-17-2007, 01:10 AM

i think i found the problem... the timing marks are way off (btdc), i think i need to remove the distributor line it up to tdc, the put in the teeth correctly. ill get on with the results!

Illestdrift · 08-24-2007, 05:32 PM

runs much better! timing was it, but i have another question... my car came with an unorthodox racing crank pulley, and the fan belt always squeeks, so do i need to get a smaller belt? the ps pump is as tight as it gets!

s13rookie · 08-24-2007, 05:54 PM

^^^ you may just need to adjust the tension on the belt

Illestdrift · 08-24-2007, 06:50 PM

i did, its as tight as it gets, and its still loose

sccrstar011 · 08-31-2007, 11:18 PM

Does your fan spin pretty freely? My belts were squeaking when my fan clutch went bad.

93'240sx'hatch · 09-01-2007, 01:13 AM

wow ive been having the same problem now i no whats wrong but mine does it even without much acceleration at all

pbcstylez · 09-14-2007, 12:50 PM

i would like to say MAF, this has been discussed many times before. search for how to repair the MAF, it takes a total of 15-20 min max, eliminate the easy variables first

*DALAZ_68* · 11-09-2007, 03:14 PM

Quote:

Originally Posted by Illestdrift

runs much better! timing was it, but i have another question... my car came with an unorthodox racing crank pulley, and the fan belt always squeeks, so do i need to get a smaller belt? the ps pump is as tight as it gets!

so it was ur crank that was marked rwrong?!....so how did u find TDC, the ghetto crewdriver in sparkplug hole trick??? :-)

cuz my shit is bogging disgusting to the point that i have to keep my foot on the gas at idle or itll drop revs and die...

gonna try TPS i just got...if thats not it, im looking into rebuilding my Intake manifold... since from what ive read in so many f*cking forums... that most of the situation is there... I.E. injectors, EGR, Vaccume leak, TPS/TB,FPR, knock sensor etc...

thats my last choice...ive checked every damn plug, leak tested compression tested... this is ultimate

*DALAZ_68* · 11-10-2007, 02:01 PM

Ok ladies and gents times for some updates

as i said before i and my mech did a air leak test and plugged up a line...

so last night me an him for around 2 hours decided to test censors galore

final findings

temp sensor (red tip) is good even did what nissan FSM recomends and dipped it in boiling water with thermometer...
spark plugs: have what my mech called ''blow by'' and had a white ish tip, which he stated means running lean...
injectors: proper voltage on all four and there all spraying properly...my mech even used a stethescope to hear them and were good
MAf: voltage is good aswell
grounds: good there
timing: right on the money stock setting, weve tried advancing and retarding the f**king thing but nothing + out of that
compression tested: its at Front: 190 190 190 178: rear, which isnt too bad
EGR: got the ebay steel block off and removed EGR assembly...and that actually made the car run worst to the point that i would start it and it would die after 5-10 seconds of being on...

we moved the idle control (adjuster on the rear right side of the engine...) and that did help much...

so we tried combination of TPS and idle control movement still blah

changed the TPS today and still blah

08-16-2007, 08:04 PM	#1
Illestdrift Join Date: Aug 2006 Location: Vancouver, Wa Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	acceleration bogging, help So the problem is.. When driving normally, my car idles, and accelerates pretty much normal. but when i get on the gas a little, when it hits around 25-3k it stops accelerating all together, but if i lift off and hit the gas again, its normal. could it be maf? 02? i have no idea i searched, but nothing was very helpful. im omw to get a new fuel filter to see if thats it, but if that isnt, im fresh out. Any help would be great!! ]Thanks all 9tb

08-16-2007, 08:15 PM	#2
95240s14 Leaky Injector Join Date: Oct 2003 Location: seattle Posts: 70 Trader Rating: (0) Feedback Score: 0 reviews	what engine? mods? __________________ I get -rep power for loving my 320whp Rb20DET

08-24-2007, 05:54 PM	#11
s13rookie Zilvia FREAK! Join Date: Mar 2002 Location: connecticut Age: 44 Posts: 1,129 Trader Rating: (0) Feedback Score: 0 reviews	^^^ you may just need to adjust the tension on the belt __________________ Ive spent most of my money on cars and women...the rest i wasted

09-14-2007, 12:50 PM	#15
pbcstylez Nissanaholic! Join Date: May 2005 Location: East Bay Age: 40 Posts: 2,110 Trader Rating: (0) Feedback Score: 0 reviews	i would like to say MAF, this has been discussed many times before. search for how to repair the MAF, it takes a total of 15-20 min max, eliminate the easy variables first __________________ parking lot pimpin... Seller Feedback here: http://www.zilvia.net/f/showthread.p...ight=pbcstylez

08-16-2007, 09:56 PM	#3
Illestdrift Join Date: Aug 2006 Location: Vancouver, Wa Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	sorry. Stock 92 ka24de, no mods at all

08-16-2007, 10:01 PM	#4
MavericStephenc Zilvia Addict Join Date: Aug 2006 Location: salem mass. Age: 37 Posts: 830 Trader Rating: (0) Feedback Score: 0 reviews	could it be electrical....like maf? edit:check and clean the iacv might help

08-16-2007, 10:08 PM	#5
kafanylovesme Zilvia FREAK! Join Date: Apr 2007 Location: Southern Cali Posts: 1,559 Trader Rating: (10) Feedback Score: 10 reviews	i have the same exact problem.... except i have a kae and no mods but exhaust. and my idle just drops way down low like 300ish at random times. i too searched and i found that it could be EGR, which is why my check engine light is on, IACV, MAF, and other stuff. but yeah any other further help is good also.

08-16-2007, 10:09 PM	#6
Illestdrift Join Date: Aug 2006 Location: Vancouver, Wa Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	maf is a possibility, but i doubt it seeing as it idles, and accelerates normally aside from when i floor it, but my buddy is coming over in a little bit, and im gonna borrow his to see if it is the maf, but has anyone else on here had this problem?

08-16-2007, 10:11 PM	#7
Illestdrift Join Date: Aug 2006 Location: Vancouver, Wa Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	egr huh, is yours only under hard acceleration too? what is the exact function of the egr?

08-16-2007, 10:25 PM	#8
MavericStephenc Zilvia Addict Join Date: Aug 2006 Location: salem mass. Age: 37 Posts: 830 Trader Rating: (0) Feedback Score: 0 reviews	egr (exhaust gas return) simply stated takes exhaust gasses from well the exhaust and reroutes them back through the engine to lower emissions. If i happen to be wrong please correct me

08-17-2007, 01:10 AM	#9
Illestdrift Join Date: Aug 2006 Location: Vancouver, Wa Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	i think i found the problem... the timing marks are way off (btdc), i think i need to remove the distributor line it up to tdc, the put in the teeth correctly. ill get on with the results!

08-24-2007, 05:32 PM	#10
Illestdrift Join Date: Aug 2006 Location: Vancouver, Wa Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	runs much better! timing was it, but i have another question... my car came with an unorthodox racing crank pulley, and the fan belt always squeeks, so do i need to get a smaller belt? the ps pump is as tight as it gets!

08-24-2007, 06:50 PM	#12
Illestdrift Join Date: Aug 2006 Location: Vancouver, Wa Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	i did, its as tight as it gets, and its still loose

08-31-2007, 11:18 PM	#13
sccrstar011 Leaky Injector Join Date: Oct 2006 Location: lynchburg, virginia Age: 38 Posts: 83 Trader Rating: (0) Feedback Score: 0 reviews	Does your fan spin pretty freely? My belts were squeaking when my fan clutch went bad.

09-01-2007, 01:13 AM	#14
93'240sx'hatch Users Awaiting Email Confirmation Join Date: Jun 2007 Location: Tennessee Age: 34 Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	wow ive been having the same problem now i no whats wrong but mine does it even without much acceleration at all

11-10-2007, 02:01 PM	#17
DALAZ_68 not giving a fuck Join Date: Apr 2007 Location: Los angeles Age: 38 Posts: 15,077 Trader Rating: (104) Feedback Score: 104 reviews	Ok ladies and gents times for some updates as i said before i and my mech did a air leak test and plugged up a line... so last night me an him for around 2 hours decided to test censors galore final findings temp sensor (red tip) is good even did what nissan FSM recomends and dipped it in boiling water with thermometer... spark plugs: have what my mech called ''blow by'' and had a white ish tip, which he stated means running lean... injectors: proper voltage on all four and there all spraying properly...my mech even used a stethescope to hear them and were good MAf: voltage is good aswell grounds: good there timing: right on the money stock setting, weve tried advancing and retarding the f**king thing but nothing + out of that compression tested: its at Front: 190 190 190 178: rear, which isnt too bad EGR: got the ebay steel block off and removed EGR assembly...and that actually made the car run worst to the point that i would start it and it would die after 5-10 seconds of being on... we moved the idle control (adjuster on the rear right side of the engine...) and that did help much... so we tried combination of TPS and idle control movement still blah changed the TPS today and still blah