Jeep CJ7 Mopar MPFI - Failed California Smog Test

Have had the MPFI on my CJ-7 for several years. Very satisfied. Problem is,
have moved to CA from TX - in CA they test for NOX - CO and CO2 readings are
excellent - failed NOX. Tester (reliable; actually a "Referee" )said the
engine was running too lean, thus failed NOX. Looking for a fix, larger
injectors?? Just advance the timing?? Need to find out - trying to
regeister in CA - but need to pass Smog

--
Message posted via http://www.carkb.com

Is your EGR working? That is supposed to cut out NOx by cooling the top
end I think.

Geese, I got 589 NOx on my manually tuned (no computer) BBD (POS) carb
in my CJ7 on a recent test and I don't even have a catalytic converter,
just a straight pipe to a Dynomax turbo muffler.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

"Tate Austin via CarKB.com" wrote:
>
> Have had the MPFI on my CJ-7 for several years. Very satisfied. Problem is,
> have moved to CA from TX - in CA they test for NOX - CO and CO2 readings are
> excellent - failed NOX. Tester (reliable; actually a "Referee" )said the
> engine was running too lean, thus failed NOX. Looking for a fix, larger
> injectors?? Just advance the timing?? Need to find out - trying to
> regeister in CA - but need to pass Smog
>
> --
> Message posted via http://www.carkb.com

Hi Tate,
I'm surprised he didn't fail you for the injection, as any variance
from stock needs certification. Was your CJ a Kalifornia car to begin
with, or a state requiring a catalytic converter? NOX is it's job:
http://auto.howstuffworks.com/catalytic-converter2.htm Anyway, a new
converter will solve your problem.
God Bless America, Bill O|||||||O
http://www.billhughes.com/

"Tate Austin via CarKB.com" wrote:
>
> Have had the MPFI on my CJ-7 for several years. Very satisfied. Problem is,
> have moved to CA from TX - in CA they test for NOX - CO and CO2 readings are
> excellent - failed NOX. Tester (reliable; actually a "Referee" )said the
> engine was running too lean, thus failed NOX. Looking for a fix, larger
> injectors?? Just advance the timing?? Need to find out - trying to
> regeister in CA - but need to pass Smog
>
> --
> Message posted via http://www.carkb.com

Like Bill said, the cat helps take care of NOx, but it needs to be at
operating temperature for it to function like it should. Take your Jeep for
a good highway run right before you take it in for the test, and it will
help immensely.

Chris

"Tate Austin via CarKB.com" <u23830@uwe> wrote in message
news:62e877555aa13@uwe...
> Have had the MPFI on my CJ-7 for several years. Very satisfied. Problem
> is,
> have moved to CA from TX - in CA they test for NOX - CO and CO2 readings
> are
> excellent - failed NOX. Tester (reliable; actually a "Referee" )said the
> engine was running too lean, thus failed NOX. Looking for a fix, larger
> injectors?? Just advance the timing?? Need to find out - trying to
> regeister in CA - but need to pass Smog
>
> --
> Message posted via http://www.carkb.com

Ditto: http://www.billhughes.com/smog.jpg
God Bless America, Bill O|||||||O


c wrote:
>
> Like Bill said, the cat helps take care of NOx, but it needs to be at
> operating temperature for it to function like it should. Take your Jeep for
> a good highway run right before you take it in for the test, and it will
> help immensely.
>
> Chris

Bill,

I think (probably wrong) that the Mopar MPFI is 'certified', at least here
in the Peoples Republik of Massachusetts.

"L.W.(Bill) Hughes III" > wrote in message
...
> Hi Tate,
> I'm surprised he didn't fail you for the injection, as any variance
> from stock needs certification. Was your CJ a Kalifornia car to begin
> with, or a state requiring a catalytic converter? NOX is it's job:
> http://auto.howstuffworks.com/catalytic-converter2.htm Anyway, a new
> converter will solve your problem.
> God Bless America, Bill O|||||||O
> http://www.billhughes.com/
>
> "Tate Austin via CarKB.com" wrote:
>>
>> Have had the MPFI on my CJ-7 for several years. Very satisfied. Problem
>> is,
>> have moved to CA from TX - in CA they test for NOX - CO and CO2 readings
>> are
>> excellent - failed NOX. Tester (reliable; actually a "Referee" )said the
>> engine was running too lean, thus failed NOX. Looking for a fix, larger
>> injectors?? Just advance the timing?? Need to find out - trying to
>> regeister in CA - but need to pass Smog
>>
>> --
>> Message posted via http://www.carkb.com

Yes it is, but if you want to pass Kalifornia's SMOG, you'd better
have that certificate in your hot little hands. Out here it's the VIN
number they run with.
God Bless America, Bill O|||||||O
http://www.billhughes.com/

Steve Foley wrote:
>
> Bill,
>
> I think (probably wrong) that the Mopar MPFI is 'certified', at least here
> in the Peoples Republik of Massachusetts.

Do they ever stop smog testing out there? It used to be a 15 year old
vehicle didn't need the smog test, but now they've locked it at 1984 and
newer.

That's why I'm using the parts from my 87 YJ to rebuild an 83 CJ.

"L.W.(Bill) Hughes III" > wrote in message
...
> Yes it is, but if you want to pass Kalifornia's SMOG, you'd better
> have that certificate in your hot little hands. Out here it's the VIN
> number they run with.
> God Bless America, Bill O|||||||O
> http://www.billhughes.com/
>
> Steve Foley wrote:
>>
>> Bill,
>>
>> I think (probably wrong) that the Mopar MPFI is 'certified', at least
>> here
>> in the Peoples Republik of Massachusetts.

They've modified SMOG laws a couple of times here in Kalifornia,
but this last time they stop it letting people like me that like old
cars at '76 and older, so this high performance tunnel port 429 engine
pictured in front of my '78 Bronco will never meet:
http://www.billhughes.com/429ford.jpg
God Bless America, Bill O|||||||O
http://www.billhughes.com/429.jpg

Steve Foley wrote:
>
> Do they ever stop smog testing out there? It used to be a 15 year old
> vehicle didn't need the smog test, but now they've locked it at 1984 and
> newer.
>
> That's why I'm using the parts from my 87 YJ to rebuild an 83 CJ.

We have unannounced highway SMOG check points, just your dui
checks.
God Bless America, Bill O|||||||O
http://www.billhughes.com/

billy ray wrote:
>
> Why not install it and just pull it out when the tests need to be done?