[DeTomaso] NPC Check Engine Light

[Dave Londry]

Attaboy Art.
Give us a report after you've run for a while.
dave

On 22/10/2011 9:27 AM, Art Stephens wrote:
> Thanks to all that helped in solving my check engine light problem. I
> replaced the O2 sensor and that solved the problem. The sensor from the
> factory would have been more than $300 from the dealer including tax. The
> sensor was apparently not available thru the aftermarket as the car first
> came out as a 2011 model. I bought a universal sensor for $39 dollars total,
> delivered. Back on the road again!
>
> Art
>
>
>
>
> -----Original Message-----
> From: Art Stephens
> Sent: Saturday, October 08, 2011 10:59 PM
> To: spkorb at gmail.com ; List Pantera
> Subject: Re: [DeTomaso] NPC Check Engine Light
>
> The sensor that I ordered is a universal type designed to be used either up
> or downstream of the catalytic converter, which probably means it's not
> right for either, sigh. Oh well, at $27 as opposed to $287, I figure it's
> worth a try. Assuming that the new sensor solves the problem with the check
> engine light, I hope it does not cause any other problems. The sensor has
> been bad for two weeks now and doesn't seem to have hurt the gas mileage. I
> hope that doesn't mean it is running so lean as to damage the engine?
>
> Art
>
>
>
> -----Original Message-----
> From: Sean Korb
> Sent: Saturday, October 08, 2011 7:36 PM
> To: List Pantera
> Subject: Re: [DeTomaso] NPC Check Engine Light
>
> In fairness, since 1996 officially, and since 1995 in practice as
> OBDII was tested before being mandated. It ensures the upstream
> function as well as the catalytic function.  Exhaust gas analysis
> every time you drive the vehicle.  I'm still not sure why I have a
> post 1996 car in the stable but i wondered why I had a post 1986 car
> in the stable a decade ago.  Maybe I'm just slow on the uptake.
>
> sean
>
> On Sat, Oct 8, 2011 at 10:19 PM, Brian Fedoroff<BFedoroff at twmi.rr.com>
> wrote:
>> "In theory, if the AF Ratio sensor in tandem with the ECM and fuel-pulse
>> delivery is fast enough and is working, the two catalytic converters and
>> downstream O^2 sensor is just a back-up system doing nothing."
>>
>> Well, just because you read it on the internet doesn't make it so.  The
>> downstream
>> sensor is also used for fine tuning NOx control on every vehicle since the
>> 1990s.  In other words,
>> it also is controlling the engine air/fuel ratio to some extent.  I
>> wouldn't
>> screw just any sensor in there if your car has to pass an emissions test.
>> Are you aware
>> that there are several different heating elements used, depending on the
>> application??
>> Using the wrong one can make the heater fail in a short amount of time,
>> and
>> your check
>> engine light will be back on in a jiffy.
>>
>>
>>
>>
>>
>> Regards,
>>
>> Brian Fedoroff
>>
>>
>>
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>
>