why is my A/f guage always on the last rich bar???
09-08-02, 08:47 PM
#1
Flinstone Power
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why is my A/f guage always on the last rich bar???
my car is a 87 GXL and my a/f guage is allways on the last rich bar no matter what RPM... does this have something to do with my 550cc secondaries?? but even at idle and anything b4 or after 5000rpm its in the last rich bar.. could my O2 sensor be bad.. or could this be b/c i am open header
09-08-02, 09:18 PM
#3
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as long as ur car doesnt stink like rich fuel out the exhaust or it doesnt waste a lot of gas.. i wouldnt worry about it... but why go 550 cc secondary on a mostly stock na?
09-08-02, 09:58 PM
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Flinstone Power
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i am running 550cc 2ndaries bc i got a s4 rebuiild with s5 rotors, rb header, ported intake, tb mod, cold air intake, all emmissions bull **** removed, ps removed, and 5/6 port sleeves removed.. ect.. so i got plenty of mods to back up my 550's... so what do i do about my a/f?? i know other guys that have them on there 7's and they work great... should i try a different brand? if so what brnad? thanks Dave
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09-08-02, 11:43 PM
#9
My autometer worked fine. Dont know how accurate it was but it seemed to be working properly.
Where did you hook up your o2 wire from the gauge to? Did you hook it up to the ecu's o2 wire or did you tap into the actual wire coming out of the o2 sensor?
Where did you hook up your o2 wire from the gauge to? Did you hook it up to the ecu's o2 wire or did you tap into the actual wire coming out of the o2 sensor?
09-08-02, 11:53 PM
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Originally posted by DCmina
Do I have to hook it up in the ECU's O2 wire? That's what the instructions says but the wire is too short.
Do I have to hook it up in the ECU's O2 wire? That's what the instructions says but the wire is too short.
just tap into the wire between the ecu and o2 sensor. anywhere along.
09-09-02, 12:02 AM
#13
I have an A/F meter and it is useful for a couple of things (idle mixture, see when you are in closed loop, pretend you are driving KITT, etc.) but they aren't accurate enough for tuning. It isn't the meter that is at fault -- it is that narrow band O2 sensors just aren't accurate anywhere but at 14.7:1. See this page for more details:
http://www.fjoinc.com/automotive/WBO2details.htm
Yes, it is a wideband sensor vendor, but the information is accurate.
A bad ground or a faulty connection might be responsible for the bad readings you get. Or it could be the sensor.
-Max
http://www.fjoinc.com/automotive/WBO2details.htm
Yes, it is a wideband sensor vendor, but the information is accurate.
A bad ground or a faulty connection might be responsible for the bad readings you get. Or it could be the sensor.
-Max
09-09-02, 12:13 AM
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Originally posted by DCmina
wait I still don't get it. You tap the wire in the engine bay right where the O2 sensor is right?
wait I still don't get it. You tap the wire in the engine bay right where the O2 sensor is right?
hell you could put 10 gauges, each 8"s apart alone the whole wire if you really wanted too... and they would all read the same.
09-09-02, 03:38 PM
#16
Flinstone Power
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ya i tapped the wire right off the O2 sensor.. my rb header came with like 3feet of new wire so i tapped the new wire that came with the header to keep my harness clean.. dave
BTW.. my O2 sensor was pretty nasty looking when i put it in the header..
also do i need to buy the auto meter wide band o2 sensor?? if so will this ork good with it in place of the stock narrow band one??
BTW.. my O2 sensor was pretty nasty looking when i put it in the header..
also do i need to buy the auto meter wide band o2 sensor?? if so will this ork good with it in place of the stock narrow band one??
09-09-02, 03:58 PM
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Originally posted by DJChunter
ya i tapped the wire right off the O2 sensor.. my rb header came with like 3feet of new wire so i tapped the new wire that came with the header to keep my harness clean.. dave
BTW.. my O2 sensor was pretty nasty looking when i put it in the header..
ya i tapped the wire right off the O2 sensor.. my rb header came with like 3feet of new wire so i tapped the new wire that came with the header to keep my harness clean.. dave
BTW.. my O2 sensor was pretty nasty looking when i put it in the header..
the you should probably change it...
also do i need to buy the auto meter wide band o2 sensor?? if so will this ork good with it in place of the stock narrow band one??
09-09-02, 10:00 PM
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A new O2 sensor? I got a Bosch one at AUtozone for $30.
I tried to install it today, but I still can't find that grey wire!
Anyone wanna tell me exactly which one to put it in?
BTW I took the pic from your site Scott 89t2.
thanks
I tried to install it today, but I still can't find that grey wire!
Anyone wanna tell me exactly which one to put it in?
BTW I took the pic from your site Scott 89t2.
thanks
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