a/f gauge is always lean
06-10-2004, 07:06 AM
#1
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a/f gauge is always lean
WTF is going on, I adjusted the fuel pressure down and it's still in the green.
I have a drag 3 complete
in-line pump
fmu
missing link
stock engine, no injectors yet
stock ecu
stock Turbo GSR
I have a drag 3 complete
in-line pump
fmu
missing link
stock engine, no injectors yet
stock ecu
stock Turbo GSR
06-10-2004, 07:08 AM
#2
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Re: a/f gauge is always lean (lexvdub1)
When pressing on the gas it should always be in the green(rich).. The air/fuel gauge and sensor your using will only show ratios from 15.1 to 14.3 or about that..
06-10-2004, 07:16 AM
#4
Re: a/f gauge is always lean (lexvdub1)
Is it in the far right green, as in, it never ever ever moves, never bounces around at all?
That means you have no connection to your 02 sensor.
That means you have no connection to your 02 sensor.
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06-10-2004, 07:29 AM
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Re: a/f gauge is always lean (tgreaves)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves »</TD></TR><TR><TD CLASS="quote">Is it grounded properly.. </TD></TR></TABLE>
If it wasn't grounded properly would the a/f gauge even work
If it wasn't grounded properly would the a/f gauge even work
06-10-2004, 07:36 AM
#9
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Re: a/f gauge is always lean (lexvdub1)
I put mine in my buddies car running a greddy blue box and it's always pretty lean (to be expected) - not sure how yours runs though. Does it show any variation at all?
btw, big difference between a good and bad ground. I've installed it with power and ground from cig lighter.
btw, big difference between a good and bad ground. I've installed it with power and ground from cig lighter.
06-10-2004, 07:38 AM
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Re: a/f gauge is always lean (lexvdub1)
I would not be using that guage to set your air fuel. That guage is about as useful as a hellen keller in a reading contest.
Get a wideband hooked up to see what your a/f is really at.
Get a wideband hooked up to see what your a/f is really at.
06-10-2004, 07:41 AM
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Re: a/f gauge is always lean (dennis)
Yeah it moves, but I'm just not use to the fact that the car is running extremely rich.
Before this the car was always in the red at idle and it would go up and down, thats why I was suprised to see that the gauge was steady in the green at idle last night
Before this the car was always in the red at idle and it would go up and down, thats why I was suprised to see that the gauge was steady in the green at idle last night
06-10-2004, 07:45 AM
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Re: a/f gauge is always lean (lexvdub1)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lexvdub1 »</TD></TR><TR><TD CLASS="quote">I have no other choice 
, till I go get the car tuned
countdown 9 days till tuned</TD></TR></TABLE>
I would try not to boost on it until you get it tuned or a wideband hooked up to see what your a/f is. It maybe rich at idle but lean up top.
, till I go get the car tuned countdown 9 days till tuned</TD></TR></TABLE>
I would try not to boost on it until you get it tuned or a wideband hooked up to see what your a/f is. It maybe rich at idle but lean up top.
06-10-2004, 07:49 AM
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Re: a/f gauge is always lean (lexvdub1)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lexvdub1 »</TD></TR><TR><TD CLASS="quote">
If it wasn't grounded properly would the a/f gauge even work </TD></TR></TABLE>
Sure will.. A little bit.. I had a bad ground on mine when I had it and it threw the results off alot..
If it wasn't grounded properly would the a/f gauge even work
</TD></TR></TABLE>Sure will.. A little bit.. I had a bad ground on mine when I had it and it threw the results off alot..
06-10-2004, 07:50 AM
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Re: a/f gauge is always lean (lexvdub1)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lexvdub1 »</TD></TR><TR><TD CLASS="quote">try not to boost 
</TD></TR></TABLE>
Im glad I dont have to worry about that..
</TD></TR></TABLE>Im glad I dont have to worry about that..
06-10-2004, 07:53 AM
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Re: a/f gauge is always lean (tgreaves)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves »</TD></TR><TR><TD CLASS="quote">
Sure will.. A little bit.. I had a bad ground on mine when I had it and it threw the results off alot.. </TD></TR></TABLE>
I'll check it today
Sure will.. A little bit.. I had a bad ground on mine when I had it and it threw the results off alot.. </TD></TR></TABLE>
I'll check it today
06-10-2004, 08:50 AM
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Re: a/f gauge is always lean (lexvdub1)
Are you getting any pinging or anything when your in boost?? If your gauge is reading lean when your in boost that would mean your air/fuel is 15.0:1 or higher.. Depending on the boost level I would think you would hear it badly if it was that high but I would still get it on the dyno to make sure anyway..
06-10-2004, 10:21 AM
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Re: a/f gauge is always lean (evil newgsrdriver)
if it dosent ping, do a good old fashioned plug check to see if your safe, disreguard those gauges, you prolly have a bad ground. i had a friend whos A/F gauge did the same thing it had a bad connection (i dont remeber which one) but just check the plugs and make sure its not pinging or detonating and you should be fine. if all is good let the lead footing commense...
06-10-2004, 10:48 AM
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Re: a/f gauge is always lean (H22isnotabigblock)
Good point.. The plugs will let you know whats going on.. I would just check them out now and if they look fine then get in your car and drive and turn the key off while in boost and let if drift to the side of the road and check the plugs..
I have heard others using this method but have not myself.. The Techedge unit on my dash does it for me..
I have heard others using this method but have not myself.. The Techedge unit on my dash does it for me..
06-10-2004, 11:09 AM
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Re: a/f gauge is always lean (lexvdub1)
dont set anything according to the a/f gauge, thewy are in accurate, they just give u an idea. if u know some with a o2 wideband, get it tuned that way, or dyno tune with afc
06-10-2004, 11:13 AM
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Re: a/f gauge is always lean (VacantBanana)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VacantBanana »</TD></TR><TR><TD CLASS="quote">dont set anything according to the a/f gauge, thewy are in accurate, they just give u an idea. if u know some with a o2 wideband, get it tuned that way, or dyno tune with afc</TD></TR></TABLE>
Well the air/fuel gauge is actually very accurate and the o2 sensor is accurate but in a narrow range that isnt applicable for tuning purposes.. But the idea is still the same, either get your hands on a wideband or take it to a dyno to get it done correctly..
Well the air/fuel gauge is actually very accurate and the o2 sensor is accurate but in a narrow range that isnt applicable for tuning purposes.. But the idea is still the same, either get your hands on a wideband or take it to a dyno to get it done correctly..
06-11-2004, 03:35 AM
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Re: a/f gauge is always lean (tgreaves)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves »</TD></TR><TR><TD CLASS="quote">Good point.. The plugs will let you know whats going on.. I would just check them out now and if they look fine then get in your car and drive and turn the key off while in boost and let if drift to the side of the road and check the plugs..
I have heard others using this method but have not myself.. The Techedge unit on my dash does it for me.. </TD></TR></TABLE>
its called a plug chop, its how i used to jet my 250Rs. i would go at WOT in one gear lower than top (IE 5th not 6th) and pull the teather then check the plugs, they can tell you alot more than that narrow A/F gauge ever will...
plug reading seems to be a lost art, noone seems to do it anymore. it suprises me because it is so easy and very accurate in telling you what is going on in your engine.
I have heard others using this method but have not myself.. The Techedge unit on my dash does it for me..
</TD></TR></TABLE>its called a plug chop, its how i used to jet my 250Rs. i would go at WOT in one gear lower than top (IE 5th not 6th) and pull the teather then check the plugs, they can tell you alot more than that narrow A/F gauge ever will...
plug reading seems to be a lost art, noone seems to do it anymore. it suprises me because it is so easy and very accurate in telling you what is going on in your engine.