Greddy A/F Wideband help

[igdrasil]

I need some help here.
Got the Greddy A/F wideband. It comes with its own sensor.
All the wiring needed to be plugged and tapped is done right, the unit is working Perfect, but the CEL light came alive.
As my previous conversations with perfworks, we agreed that the CEL is because the ECU is seeing an OPEN CIRCUIT "problem" because the Harness where the stock sensor was plugged is now open, only the signal wire is linked to the signal wire from the Greddy Unit.
Check the attachment.

Is there anyway I can run the cicuit parallel or just link the sensor wires to the stock harness? The problem is, that I dont know the greddy sensor wiring diagram.

Any help?

 

[chdesign]

if you used the Greddy unit in place of a stock O2 sensor then youa re throwin a CEL because the ECU is not seeing resistance from teh heater on the O2 Seonsor and you are getting a low voltage CEL thrown. Or if you dont' ahve a simulator on teh 2nd O2 then you are getting a CEL from that.

 

[igdrasil]

if you used the Greddy unit in place of a stock O2 sensor then youa re throwin a CEL because the ECU is not seeing resistance from teh heater on the O2 Seonsor and you are getting a low voltage CEL thrown.

Correct, the ECU is expecting more than .55v in 3 minutes, not being present, will throw the CEL. So, I would like to map the sensor wires so I can run it parallel if its possible.
Maybe the greddy comes with it because they run using other voltages? thats only a thought.

 

[perfworks]

its the first one CH
did you talk to anyone at greddy today?
they should know for sure if the signals can be interupted.
i will retract my statement i made yesterday about there not being a problem with the splicing because after some conversations i had today about widebands with a distibutor from bosch. i am not familiar with the greddy unit.

sorry man but i do have an account with greddy and can call tomorow if you dont first. let me know.

 

[perfworks]

didnt you say that the kit came with those clips for splicing in to the harness?

 

[igdrasil]

didnt you say that the kit came with those clips for splicing in to the harness?

sorry man but i do have an account with greddy and can call tomorow if you dont first. let me know.

yes, those clips came, not for the sensor harness but the unit power source, only one clip for the signal.

Man, that would be great if you can help me with it. I havent called them yet, i dont have any kind of account with them, plus not the kind of knowledge you may have and my english is not that good to have a very technical conversation.

 

[igdrasil]

Manual illustraion1

picture

 

[igdrasil]

Manual illustraion2

picture 2

 

[perfworks]

i will call them tommorow and get the scoop exactly but from seeing your pics i would say that all you would have to do is connect the "heating" voltage from the stock ecu to the A/F sensor and connect the the green signal wire and you will be fine.
but i will make sure of it tommorow. i will need some info though please.
PM me the model # of the unit and serial # if there is one so i know i am talking about the right one.
ill have them send me a wiring diagram in the morning via fax and ask them to give me a verbal confirmation to what i just suggested.
cool?

 

[igdrasil]

60mm Electronic Warning Gauge - Air/Fuel Ratio 16.0-8.0

Thanks

well....check the picture....i think thats the serial#, this unit I got it from Terry (spool-turbo.com)

greddy part number is 16000811

 

[perfworks]

all right whatever info i get i will post tommorow afternoon

 

[PaulMP3]

what is the cost of that unit?

 

[perfworks]

yeah i forgot to ask that!

 

[PaulMP3]

you got any pics of the display screen?

 

[igdrasil]

what is the cost of that unit?

greddy SRP is $340.

you got any pics of the display screen?

there you go...

 

[Little Beavis]

So is the Greddy a/f a "real" wideband?

 

[PaulMP3]

how does that compare, is it worth the extra money for a true wideband o2?

 

[igdrasil]

what you mean with real?
I can try explain the feedback its giving me...

At partial throttle, its always showing 14.6 and some adjust pulses like: 14.6 - 16.0, 14.6 - 16.0, needle jumping every 2 secs aprox. I think thats the closed loop operating mode.

At full throttle from lower rpm is the same until I reach 5000rpm then it goes to 13.2 most of the time. I think thats open loop, or protecion mode.

from flyin miata -"Over a certain load - calculated by air flow - the ECU will go open loop"

This is also true, what I did to prove that, I shifted to 4th gear @ 15mph, thats around 1,000rpm and went WOT, (car was all shaking because of the load) and after 2 seconds, A/F went to 13.2.

 

[Little Beavis]

Ummm. . .sounds like it works, so I guess it is "as good as" a wideband. I heard it was good anyway, so $340 is far better than $600! Hmmm. . .most interesting.

 

[spoolinmp3]

I currently have the Grddy a/f meter in the car alongside a wideband. It is very accurate for lean conditions and stoich. However its rich readings are not extra accurate. Forexample if the wideband reads 10.4:1 The greddy will always read in the 8.1:1 range. So if the wide band reads anything less then 11.5:1 the greddy a/f will read in the 8 range. It is also imparitive that you properly break in the 02 sensor so that you get correct readings and this can be somewhat a pain in the ass. If the gauge is not broken in it will jump around alot