Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: (email redacted)


Several months ago I replaced the Link A/F meter (which I could never quite
figure out where to mount) with the Westach A/F gauge (in a dual gauge pod
along with boost gauge on the windshield pillar). AFAIK, everything has worked OK
for six months. Now all of the sudden it is acting flaky -- suddenly it will
simply have no signal, then suddenly it's working OK again -- so I'm revisiting
the install. I just reread all instructions twice.

The Link A/F meter has four wires -- switched 12v, chassis ground, O2 sensor
signal, and O2 sensor signal ground.

The Westach has three terminals -- switched 12v, chassis ground, and O2
sensor signal. There is NO connection for an O2 sensor ground. I simply left the O2
sensor ground wire unconnected.

Does the O2 sensor ground wire NEED to be connected for proper/reliable
operation? If so, to what? Any/all ideas appreciated?

Thanks,
Jim in Tucson

This read-only message was archived from a public mail list.
Mail From: Bill Cardell <(email redacted)>

Probably best to hook o2 sensor ground to same spot as meter ground.


Bill Cardell (TurboDog's Dad)
Flyin' Miata
www.flyinmiata.com <flyinmiata.com/>
www.fmprotege.com <fmprotege.com/>
970-242-3800


-----Original Message-----
From: (email redacted) [mailto:(email redacted)]
Sent: Tuesday, May 27, 2003 6:54 PM
To: (email redacted)
Subject: Narrow band A/F meter Q



Several months ago I replaced the Link A/F meter (which I could never quite
figure out where to mount) with the Westach A/F gauge (in a dual gauge pod
along with boost gauge on the windshield pillar). AFAIK, everything has
worked OK for six months. Now all of the sudden it is acting flaky --
suddenly it will simply have no signal, then suddenly it's working OK again
-- so I'm revisiting the install. I just reread all instructions twice.

The Link A/F meter has four wires -- switched 12v, chassis ground, O2 sensor
signal, and O2 sensor signal ground.

The Westach has three terminals -- switched 12v, chassis ground, and O2
sensor signal. There is NO connection for an O2 sensor ground. I simply left
the O2 sensor ground wire unconnected.

Does the O2 sensor ground wire NEED to be connected for proper/reliable
operation? If so, to what? Any/all ideas appreciated?

Thanks,
Jim in Tucson

This read-only message was archived from a public mail list.
Mail From: "Ray" <(email redacted)>

I disagree slightly. The meter and O2 sensor signal wires should indeed be
grounded at the same point but it should be the point where the O2 sensor
ground wire is normally grounded. For cars with an OEM 4-wire O2 sensor
that point is at the ECU connector only (pin 2D for a '94-'95 or pin 3O for
a '96-'97). Pre-'94 cars with 1-wire O2 sensors are grounded to the engine
block via the exhaust header but when they are converted to 4-wire O2
sensors the sensor's signal ground should be connected to the same ground
point as the MAF/CAS ground wire (B/LG wire, ground point number 2 on the
schematic). The 4-wire O2 sensor's heater ground wire on a pre-'94 should
be connected to the closest available block or chassis ground.


----- Original Message -----
From: "Bill Cardell" <(email redacted)>
To: <(email redacted)>; <(email redacted)>
Sent: Tuesday, May 27, 2003 7:12 PM
Subject: RE: Narrow band A/F meter Q


> Probably best to hook o2 sensor ground to same spot as meter ground.
>
>
> Bill Cardell (TurboDog's Dad)
> Flyin' Miata
> www.flyinmiata.com <flyinmiata.com/>
> www.fmprotege.com <fmprotege.com/>
> 970-242-3800
>
>
> -----Original Message-----
> From: (email redacted) [mailto:(email redacted)]
> Sent: Tuesday, May 27, 2003 6:54 PM
> To: (email redacted)
> Subject: Narrow band A/F meter Q
>
>
>
> Several months ago I replaced the Link A/F meter (which I could never
quite
> figure out where to mount) with the Westach A/F gauge (in a dual gauge pod
> along with boost gauge on the windshield pillar). AFAIK, everything has
> worked OK for six months. Now all of the sudden it is acting flaky --
> suddenly it will simply have no signal, then suddenly it's working OK
again
> -- so I'm revisiting the install. I just reread all instructions twice.
>
> The Link A/F meter has four wires -- switched 12v, chassis ground, O2
sensor
> signal, and O2 sensor signal ground.
>
> The Westach has three terminals -- switched 12v, chassis ground, and O2
> sensor signal. There is NO connection for an O2 sensor ground. I simply
left
> the O2 sensor ground wire unconnected.
>
> Does the O2 sensor ground wire NEED to be connected for proper/reliable
> operation? If so, to what? Any/all ideas appreciated?
>
> Thanks,
> Jim in Tucson
>
>

This read-only message was archived from a public mail list.
Mail From: (email redacted)


I thought about that initially, but it seemed to work w/o so I left it
unhooked. I will try that.
Thanks,
Jim

>
> Probably best to hook o2 sensor ground to same spot as meter ground.
>
>
> Bill Cardell (TurboDog's Dad)
> Flyin' Miata
> <A HREF="flyinmiata.com/">www.flyinmiata.com</A>
> <A HREF="fmprotege.com/">www.fmprotege.com</A>
> 970-242-3800
>
>
> >>
>> -----Original Message-----
>> From: (email redacted) [mailto:(email redacted)]
>> Sent: Tuesday, May 27, 2003 6:54 PM
>> To: (email redacted)
>> Subject: Narrow band A/F meter Q
>>
>>
>>
>> Several months ago I replaced the Link A/F meter (which I could never quite
>> figure out where to mount) with the Westach A/F gauge (in a dual gauge pod
>> along with boost gauge on the windshield pillar). AFAIK, everything has
>> worked OK for six months. Now all of the sudden it is acting flaky -- suddenly
>> it will simply have no signal, then suddenly it's working OK again -- so I'm
>> revisiting the install. I just reread all instructions twice.
>>
>> The Link A/F meter has four wires -- switched 12v, chassis ground, O2
>> sensor signal, and O2 sensor signal ground.
>>
>> The Westach has three terminals -- switched 12v, chassis ground, and O2
>> sensor signal. There is NO connection for an O2 sensor ground. I simply left
>> the O2 sensor ground wire unconnected.
>>
>> Does the O2 sensor ground wire NEED to be connected for proper/reliable
>> operation? If so, to what? Any/all ideas appreciated?
>>
>> Thanks,
>> Jim in Tucson
>