Auto-Forums.net

[Gerry Canevaro]

I'm having a severe problem getting my 1987 Nissan to pass the
California Smog Test. For the second time in a row, I was required to
go to a "Test Only" station. These stations are not allowed to
perform any repairs and therefore when I failed, I had to take my car
to another mechanic. The car is one of the last carbureted models
manufactured by Nissan.

This mechanic worked on the car and made some adjustments to the
timing. He also replaced the EGR valve. Unfortunately, although he
is a licensed California Smog Mechanic, he couldn't sign me off for
the smog test as I had to go back to the "Test Only" station.

The car passed the HC and CO tests easily but failed the NO tests by a
significant margin. Assuming that the EGR valve was properly replaced
and is working correctly now, is this condition something that
replacing the catalytic converter might solve?


I'm having a severe problem getting my 1987 Nissan to pass the
California Smog Test. For the second time in a row, I was required to
go to a "Test Only" station. These stations are not allowed to
perform any repairs and therefore when I failed, I had to take my car
to another mechanic. The car is one of the last carbureted models
manufactured by Nissan.

This mechanic worked on the car and made some adjustments to the
timing. He also replaced the EGR valve. Unfortunately, although he
is a licensed California Smog Mechanic, he couldn't sign me off for
the smog test as I had to go back to the "Test Only" station.

The car passed the HC and CO tests easily but failed the NO tests by a
significant margin. Assuming that the EGR valve was properly replaced
and is working correctly now, is this condition something that
replacing the catalytic converter might solve?


Test Max Ave Meas Max Ave Meas
Max Ave Meas

15 MPH 130 31 61 0.8 0.1 0.05
835 237 1231
25 MPH 105 20 40 0.7 0.1 0
774 199 1585


Thanks in advance for any suggestions.

Gerry




Thanks in advance for any suggestions.

Gerry

[willshak]

On 11/21/2004 9:12 PM US(ET), Gerry Canevaro took fingers to keys, and
typed the following:

[Gerry Canevaro]

Thanks willshak for your quick and on-point reply. Prior to going
back for a retest, I will get the catalytic converter replaced.
Hopefully, that will do it. Also hopefuuly, I will be able to avoid
having to go to a "Test Only" station next time (2 years from now)
although I suspect not as California seems to be targeting older cars.



On Mon, 22 Nov 2004 04:11:40 -0500, willshak <willshak@hvc.rr.com>
wrote:

[John Smith]

Change the valve in the carburetor and you should pass. I had a Sentra
that had the problem and replaced all those items you mentioned and it
turned out to be the valve in the carburetor. It is electronic and you
just have to take the top off the carburetor and replace it and you will
pass...

Gerry Canevaro wrote: