Wideband LC-2 DB gauge blinking 7.4

[RussianMax]

I installed the LC2 wideband.
Red - pin 12(power supply)
Black - grounded on metal
Yellow - pin 76 (front o2) Analog output one (yellow) is 0V = 7.35 AFR and 5V = 22.39 AFR which is brown for lc1
Brown - crimped to a plastic cap

The DB gauge blinks 7.4 even when the car has been off for a while.
Red - 12v radio wire
Yellow - Illumination radio wire
Black - grounded on metal
White - connected to LC2 yellow wire which is connected to pin76

I tried grounded both wires to same source like it suggests and separate. No difference. When i crank the car after lc2 warms up it reads 22.3 or 7.5. Any suggestions please comment

 

[Wanagofast]

Your wiring looks good. Its exactly like mine. (lc2 warm up) free air adjustment before starting it?
My suggestion is make sure the wideband's yellow has a solid connection.
Mine blinks 7.4 when cars off then after starts it starts reading. That's weird bro...

 

[RussianMax]

Yes once it warms up, it sticks with a reading. They all have good connections. I just can even leave gauge plugged in because itll kill my battery

 

[1990TSIAWDTALON]

+2 on free air recalibration

 

[92AWDHX40]

Yes had the same problem buti ended up getting a new one but calibrate it.

 

[RussianMax]

Iv already re-calibrated twice. Should the gauge stop blinking after car is off?

 

[FIBA M - EC17PSE]

Right i had this same issue. might sound stupid but they dont like to be powerd with anything else! I used the lighter and radio originally as a source but then went to the ignition barrel and that seemed to work well and has been for years now. I have both to 1 power location. I dont have any pics im afraid sorry

 

[RussianMax]

Right i had this same issue. might sound stupid but they dont like to be powerd with anything else! I used the lighter and radio originally as a source but then went to the ignition barrel and that seemed to work well and has been for years now. I have both to 1 power location. I dont have any pics im afraid sorry

Thank you, so you just used the same power circuit? So you suggest i also use pin12

 

[FIBA M - EC17PSE]

I dont remember the pinouts sorry. If thats a live on a switched then yes that should work fine BUT only to feed the wideband. Nothing else can be wired to that pin out then after. As it will then cause it a weak draw of voltage and thats what the 7.4 is about.

 

[Nuzzi]

Unless im reading your first post wrong it seems like something is off with the wiring. Is your 12v source switched with ignition? Good ground? The wb 0-5v wire goes straight to the gage, the nb 0-1v wire will feed the ecu, disconnect the stock o2 completely.

 

[RussianMax]

Unless im reading your first post wrong it seems like something is off with the wiring. Is your 12v source switched with ignition? Good ground? The wb 0-5v wire goes straight to the gage, the nb 0-1v wire will feed the ecu, disconnect the stock o2 completely.

Yeah the 12v is switched, good ground, 0-5v is connected to the gauge which is connected to the front o2 signal to ecu

 

[Nuzzi]

Exactly my point, the 0-5v goes to the gage only, the narrow band 0-1v output goes to the ecu.

 

[RussianMax]

UPDATE: The power source was the problem, I attached the DB gauges power wire to the same source as the LC2 which is pin12 on ecu, Now doesn't blink 7.4. Car currently doesn't run but I will do an update once I get it to start. thank you to everyone