newbie needin some help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

scotland200sx · 09-25-2005, 08:39 AM

thanks for the help smily.

ill get that sorted asap and i hope it cures the mpg problem and the noise.

ill forget all the other things until this is done

cheers!!

smily_vigor · 09-25-2005, 09:06 AM

No problem man, hope this turns out to be the problem, so that you can get it rectified, well if not we'll get some more ideas. Let know how it goes.

scotland200sx · 10-11-2005, 06:38 PM

ok i got my gasket fixed but i'm still getting crap mpg. i have plugged diagnostic software into it and i'm not getting any fault codes (55) however the o2 sensor signal seems to fluctuate quite alot. the car also runs lean then rich then lean then rich back and forth.

scotland200sx · 10-12-2005, 09:53 AM

bump!!!!!!!!!!

xxxjovaxxx · 10-12-2005, 12:37 PM

hey, i think you are having a similar problem to my brother. my brother has a 240SX hatch (KA24E). his car starts at optimal air/fuel, then it slowly goes up to rich. while in idle, the car reaches its richest state, then while driving, the air/fuel bounces back and forth between lean and rich. we are going to clean out the throttlebody and replace the air filter to see if maybe that is doing it, but i think it may be something a little deeper...

tt99ol · 10-12-2005, 12:45 PM

it sounds like the o2 sensor is doing its job properly, they are supposed to fluctuate between lean and rich rapidly, but if the fluctuation is too slow you would need a new o2 sensor. Do you have an air/feul ratio gauge? if so it should fluctuate fast and consistently, if it doesnt than the o2 sensor could be the problem.

scotland200sx · 10-12-2005, 02:35 PM

thanks!

i dont know what to do now. ill probebly sell the car if i cant fix it.

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09-25-2005, 08:39 AM	#1
scotland200sx Join Date: Sep 2005 Location: scotland Posts: 19 Trader Rating: (0) Feedback Score: 0 reviews	thanks for the help smily. ill get that sorted asap and i hope it cures the mpg problem and the noise. ill forget all the other things until this is done cheers!!

09-25-2005, 09:06 AM	#2
smily_vigor Leaky Injector Join Date: Sep 2004 Location: Montreal, Quebec Age: 43 Posts: 143 Trader Rating: (0) Feedback Score: 0 reviews	No problem man, hope this turns out to be the problem, so that you can get it rectified, well if not we'll get some more ideas. Let know how it goes.

10-11-2005, 06:38 PM	#3
scotland200sx Join Date: Sep 2005 Location: scotland Posts: 19 Trader Rating: (0) Feedback Score: 0 reviews	ok i got my gasket fixed but i'm still getting crap mpg. i have plugged diagnostic software into it and i'm not getting any fault codes (55) however the o2 sensor signal seems to fluctuate quite alot. the car also runs lean then rich then lean then rich back and forth.

10-12-2005, 09:53 AM	#4
scotland200sx Join Date: Sep 2005 Location: scotland Posts: 19 Trader Rating: (0) Feedback Score: 0 reviews	bump!!!!!!!!!!

10-12-2005, 12:37 PM	#5
xxxjovaxxx Leaky Injector Join Date: Feb 2005 Location: NJ Posts: 85 Trader Rating: (0) Feedback Score: 0 reviews	hey, i think you are having a similar problem to my brother. my brother has a 240SX hatch (KA24E). his car starts at optimal air/fuel, then it slowly goes up to rich. while in idle, the car reaches its richest state, then while driving, the air/fuel bounces back and forth between lean and rich. we are going to clean out the throttlebody and replace the air filter to see if maybe that is doing it, but i think it may be something a little deeper...

10-12-2005, 12:45 PM	#6
tt99ol Zilvia Addict Join Date: Jan 2005 Location: quartz hill CA Age: 38 Posts: 644 Trader Rating: (8) Feedback Score: 8 reviews	it sounds like the o2 sensor is doing its job properly, they are supposed to fluctuate between lean and rich rapidly, but if the fluctuation is too slow you would need a new o2 sensor. Do you have an air/feul ratio gauge? if so it should fluctuate fast and consistently, if it doesnt than the o2 sensor could be the problem.

10-12-2005, 02:35 PM	#7
scotland200sx Join Date: Sep 2005 Location: scotland Posts: 19 Trader Rating: (0) Feedback Score: 0 reviews	thanks! i dont know what to do now. ill probebly sell the car if i cant fix it.