air/fuel mixture - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

zdude · 07-06-2004, 12:55 PM

i think the previous owner f'd up my a/f mixture, maybe to "give it more power" which isnt gonna happen considering he knew jack sh*t about cars... anyway, when ever i accelerate, it back fires between shifts, sounds kind of cool when im really on it, but normal acceleration it sounds like a$$. also, when its idling, it sort of pops every couple of seconds, i heard on a different forum that that is normal, but i was wondering if that could be solved with the renewed mixture...also, i havent messed around with this sort of thing yet, and neither have any of my friends, so i was wondering how i would fix the a/f mixture...my first idea was cam timing, but now that i think about it more my guess is the valve timing

thanks
paul

F3600 · 07-07-2004, 08:06 AM

maybe your fuel regulator is shot try change it with a new.

zdude · 07-07-2004, 01:21 PM

how much $$$ is that

papershot · 07-07-2004, 08:59 PM

The Nismo fuel regulator costs somewhere around $120

zdude · 07-08-2004, 05:33 AM

i dont have the money laying around to spend that for something i may not know still works, is there a way to test my stock reg. before buying a new one??

F3600 · 07-09-2004, 08:06 AM

the stock one is less pricey call your nissan dealer... buy a Factory service manual for testing it ... i think you need a vacuum hand pump but im not sure. If you are too poor to buy the FSM search online , there some copy somewhere for the sr20det and ca18det but i think the testing is the same for the fuel regulator

07-06-2004, 12:55 PM	#1
zdude Leaky Injector Join Date: May 2004 Location: oconomowoc, wicsonsin Age: 33 Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	air/fuel mixture i think the previous owner f'd up my a/f mixture, maybe to "give it more power" which isnt gonna happen considering he knew jack sh*t about cars... anyway, when ever i accelerate, it back fires between shifts, sounds kind of cool when im really on it, but normal acceleration it sounds like a$$. also, when its idling, it sort of pops every couple of seconds, i heard on a different forum that that is normal, but i was wondering if that could be solved with the renewed mixture...also, i havent messed around with this sort of thing yet, and neither have any of my friends, so i was wondering how i would fix the a/f mixture...my first idea was cam timing, but now that i think about it more my guess is the valve timing thanks paul __________________ -injen Intake -cat back exhaust with unknown muffler -15" maxima rims -sony deck w/ RF 12 inch sub and walmart amp -2" eibach sportlines pics up as soon as i can downsize them

07-07-2004, 01:21 PM	#3
zdude Leaky Injector Join Date: May 2004 Location: oconomowoc, wicsonsin Age: 33 Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	how much $$$ is that __________________ -injen Intake -cat back exhaust with unknown muffler -15" maxima rims -sony deck w/ RF 12 inch sub and walmart amp -2" eibach sportlines pics up as soon as i can downsize them

07-08-2004, 05:33 AM	#5
zdude Leaky Injector Join Date: May 2004 Location: oconomowoc, wicsonsin Age: 33 Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	i dont have the money laying around to spend that for something i may not know still works, is there a way to test my stock reg. before buying a new one?? __________________ -injen Intake -cat back exhaust with unknown muffler -15" maxima rims -sony deck w/ RF 12 inch sub and walmart amp -2" eibach sportlines pics up as soon as i can downsize them

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07-07-2004, 08:06 AM	#2
F3600 Zilvia Junkie Join Date: Apr 2002 Posts: 364 Trader Rating: (0) Feedback Score: 0 reviews	maybe your fuel regulator is shot try change it with a new.

07-07-2004, 08:59 PM	#4
papershot Zilvia Junkie Join Date: May 2004 Location: CT Posts: 368 Trader Rating: (0) Feedback Score: 0 reviews	The Nismo fuel regulator costs somewhere around $120

07-09-2004, 08:06 AM	#6
F3600 Zilvia Junkie Join Date: Apr 2002 Posts: 364 Trader Rating: (0) Feedback Score: 0 reviews	the stock one is less pricey call your nissan dealer... buy a Factory service manual for testing it ... i think you need a vacuum hand pump but im not sure. If you are too poor to buy the FSM search online , there some copy somewhere for the sr20det and ca18det but i think the testing is the same for the fuel regulator