Fuel-air guage problems

[BIG-EV]

im having some issues with my fuel to air guage. its an auto meter 1 so i assume its good quality but after connecting it up to one of the O2 sesors im not getting a great reading, only when i plat the foot it shows me. any ideas it told me to tap into the O2 sensor wire which i chose the right 1 because its closer.
its on a VT v6

[delcowizzid]

it should swing back and forth when crusing and at idle it should sit still on a ratio and at wot it should relatively still on an af ratio.

[TUF UTE]

go from the ecu dude

[BIG-EV]

so i attach it to the input at the ecu. could you show me how via a pic or some sort.

go from the ecu dude

[SMIT]

I am about to do the same install, it needs to goto the 02 sensor wire coming from the ecu, i just dont know what one, does anyone know?

[stevoss]

to get an accurate reading you need a wideband sensor / gauge, the one you have just joins to the signal wire on the oxy sensors but be careful if they absorb the current/ reading from the sensor its going to mess with the ecu and run like shit.

[delcowizzid]

yip ive they can pull upwards of 90mv's off the sensor signal wire sometimes depending on brand

[alien]

OK, in the VT V6's the Powertrain control module has two Exhaust gas sensor connections.

LH Bank:
+ - Violet [Location D15]
- - Violet/Black [Location D16]

RH Bank:
+ - Gray [Location D13]
- - Gray/Black [Location D14]

Location D is the top row of connections on the TOP PCM Connector. If you look at the connector with the clip facing towards the ground, all 4 will be in the top row on the far left!

Please note, if an abnormal voltage drain is seen, it will start throwing errors through the ECU. If you want the diagram of that, available on request, i'm just a little busy atm to post it.

[SMIT]

yip ive they can pull upwards of 90mv's off the sensor signal wire sometimes depending on brand

Its an autometer ultralite, from memory which is wideband which is the better one yeah?

One other thing came to me, i have a turbo on my car so would that mean each sensor would be reading different ratios? im no mechanic but is that correct? Does that mean i need 2 guages or just tap into the 02 sensor on turbo side?

[alien]

Since i have recieved PM's about images. Here they are below!

In this image, you can see the connectors to the PCM. The one labelled YB193 is the one which has the oxy sensor wires.


In this image, you can see a close up of the actual YB193 connector with colours and guides for which wires go where.


And this is the image about the voltage details for what the PCM reacts to.

[delcowizzid]

if its a wideband guage it wont work with a narrow band sensor

[ephect]

it wont matter where you tap into the wire, i've done mine in the engine bay and i've had not problems. my last set of o2 sensors werent giving me proper readings (i also had faults logged) when i changed them, the read outs are pritty much instant bar cold mornings takes a little to warm up. just remember to solder connections.

[SMIT]

Ok im getting confused, is the sensor in the VT Wideband or Narrowband? i have a narrowband sensor i think.

[delcowizzid]

VT should be narrowband

[SMIT]

would it also be smart to put the connect it to the maifold with the turbo attached? lol or do i need 2?

[delcowizzid]

where are both of the sensors at now one in the drivers manifold and one after the turbo the ecu will be wondering whats going on if they are

[SMIT]

where are both of the sensors at now one in the drivers manifold and one after the turbo the ecu will be wondering whats going on if they are

i never thought about that, could that be a reason why it could be idling ruff? im not 100% sure where they are atm, but i didnt change locations of the 02 sensors i had to lengthen one of the o2 sensor wires though for the manifold with the turbo on it? wait if i extended the wires then the resitance and VDR (voltage drop) would be differnet correct, rendering the ecu input signal slightly off?

[delcowizzid]

nah you can extend the wires all good as long as they were soldered.if one side sensor is getting its signal from 3 cylinders on the drivers side but the other side is getting signal from all 6 cylinders in a conjoined manifold like the one with the turbo on it and the crossover going into it you will have issues thats for sure.allso if they are before the turbo they will get way to hot and die pretty quick.