Air Fuel Ratio wiring

jinkl · Jul 15, 2005

I bought a Autometer AFR meter
went to wiring shop
showed them my ecu diagram
http://www.zerotohundred.com/newforums/attachment.php?attachmentid=36978

then tapped the signal from the ECU o2 sensor
but im getting lean all the way
even start engine showing lean only

anyone experience here to see what i have done wrong in the wiring. Must I tap straight from the o2 sensor ?

cipan_supercas · Jul 15, 2005

ppstt psst...

clue : wideband.... :P

rorytate · Jul 15, 2005

jinkl,

try attached at the o2 sensor itself...mine attached to the sensor.

can page me to assist you out, location cheras

drexchan · Jul 16, 2005

to tap from the sensor wire (NTK Japan 3F25)... the black one is positive, gray is negative. Don't use body ground.. won't be accurate.

It's always nicer to have a proper adaptor/socket, instead of cutting the wire. My friend know where to get it but need to order in bulk...

jinkl · Jul 16, 2005

cipan_supercas said:
ppstt psst...

clue : wideband.... :P

wideband terus pokai ler :P

ftzone · Jul 16, 2005

hah! common misconception.
O2 sensor must be warmed up before that AF Ratio Meter can function lah..
u go drive around for 10mins.. den u see carefully.... it is working already. if ur engine start and only warmed up at idle it is useless also.. must drive around...

eh..and the diagram is for 4G93 la bro.. your car is 4G63 where got same?? same ah??
hehehe.. that is the diagram i provide.. :D

jinkl · Jul 16, 2005

ftzone : 93 n 63 is same sockets , ecu oso interchangeable

acbc · Jul 16, 2005

If O2 has 1 wire... need to warm up first. I'm using AutoMeter also on 4G63. Tap 1 wire directly to O2 sensor itself. Normally, I'll wait around 2 mins b4 driving. Works ok.

But, after a while, the meter start showing dancing LEDs... sign of dirty O2 sensor or faulty sensor.

jinkl- · Jul 16, 2005

rorytate : hehe , mau lacing ah

gsr · Jul 18, 2005

yup...my o2 sensor needs warming up as well b4 the AFR gives any signal

the dancing LEDs is normal cos the ECU is operating under closed-loop to constantly monitor combustion and fuel parameter to achieve stoichiometric A/F ratio.

Mine used to dance as well till i changed to a 1st gen ECU without o2 sensor and EPROM. It only shows lean under closed-loop and operates under WOT

rorytate · Jul 18, 2005

Jinksy, mana boleh race sama your 63T la....me sure kalah giler one ler...kekeke

[email protected]
[email protected]

incase you nneed to page me, i'm online via the messenger

jinkl · Jul 18, 2005

alarrrrr hehehe
lacing lacing saje lar

rorytate · Jul 18, 2005

tarak le...me kaki rally...mana ada power to drag like you lar...LOLs

PutraCraze · Jul 18, 2005

fuiyo... penganas penganas all here...

jinkl- · Jul 19, 2005

putracraze : where got ler , all "my car slow bai"

PutraCraze · Jul 19, 2005

ya rite.... funny until my backside burned.....:P

PutraCraze · Jul 19, 2005

ok... since we had this topics... here i gladly like to know is there any forumers using this guage on mitsu 5537 ECU??? where u tap the signal from... or rather how's your wiring looks like???

PutraCraze · Jul 19, 2005

or a schematic diagram would be much appreciated....

delphinium · Jul 19, 2005

just installed my AFR meter yesterday. took me 3 hours hahaha to get it done. Most of the time I spent on korek2 the lobang for the A pillar meter mounting. Here is the result: (after 02 sensor has heated up)

The meter shows lean at idle all the time.
At WOT, it shows rich (like stated in the manual).
When cruising, it dances around Stoichiometric area. This is due to the ECU constantly trying to make the engine running stoich (according to manual).
When decelerating, no LED at all.

By the way, I tapped the 02 signal from ECU (the closest to it) since the manual recommended NOT to tap from the sensor (most of sensor wires are shielded).

wildboar · Jul 19, 2005

fuiyooo..someone got afr liao...autometer ka?? i oso considering to get one..love the autometer cobalt series..how complicated is the wiring process ar??

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