It turned out that the problem was with the catalytic convertor.
Although the NOx was low, the convertor itself was apparently
installed wrongly. A new cat and exhaust later, and the car passed.

On Sat, 24 Jan 2004 18:14:02 GMT, Blue Moon <mfoco@hotmail.com> wrote:

>I have a 1994 Jeep Grand Cherokee, 8 cylinder. I am having problems
>with passing emissions inspection in north NJ (Sussex County). The
>original results were:
>
>Gas Standard Reading Result
>HC 100 27 Pass
>CO% 0.50 0.69 Fail
>CO2% 13.9
>RPM 2668
>
>No figures were given for NOx or O2%.
>
>Okay, no big problem, thinks I. The following parts were replaced:
>
>Oil filter & oil
>Air filter
>8 Spark plugs
>Plug wires (including the distributor/coil wire)
>Oxygen Sensor
>
>A mechanic checked the vehicle out, and had a friend of his test
>emissions. Despite the vehicle running excellently (no pings, knocks,
>stalls, bad starts, dirty exhaust etc.) they could only get the CO%
>down to about 0.51 - 0.52.
>
>He tested a load of parts, and reported the following:
>
>1. Fuel pressure test - ok
>2. Coolant temp sensor - ok
>3. PCV - ok
>4. Air filter - new
>5. EGR - 100% working ok
>6. B-map - ok
>7. TPS - ok
>8. Injector Balance - ok
>9. Plugs, Wires - New
>10. Throttle body - cleaned, ok
>11. AIS Motor - ok
>12. Air control motor - ok
>
>He couldn't figure out what the problem was, but suggested I simply
>put it through the test with a gallon of alcohol.
>
>I filled up the gas tank with Mobil Super +, and drove around for a
>week to clean the fuel lines through. I filled up again with Mobil
>Super +, added a quart of dry gas and a gallon of denatured alcohol
>(so I'm guessing the tank would have had about 4% - 5% alcohol), drove
>it 15 miles and put it through inspection.
>
>To my amazement, I got the following results:
>
>Gas Standard Reading Result
>HC 100 30 Pass
>CO% 0.50 0.61 Fail
>CO2% 14.1
>RPM 2430
>
>I'm like .... WTF????
>
>I've been told the local gas stations are putting additives in the gas
>in this area due to the weather, and a lot of cars are losing fuel
>consumption and failing emissions inspections. But this is
>ridiculous. I can hardly import a tank of gas from Florida, so what
>the hell else can I do to get this thing to pass?
>
>Any suggestions gratefully received, short of "move to a state with
>less draconian measures".

--
Blue Moon

 

Go to the parts store and buy the emissions system pass in a can. It will
enable a cleaner burn just follow the directions on the can. If you are
burning oil your co2 will increase however, your cat converter should get
hot enough to cook off minor oil burning. Your cat converter may be going
bad also.

--
HarryS
JAFGBR
"Blue Moon" <mfoco@hotmail.com> wrote in message
news:1368716527259d1b83c9c2207ed01523@news.teranew s.com...
> It turned out that the problem was with the catalytic convertor.
> Although the NOx was low, the convertor itself was apparently
> installed wrongly. A new cat and exhaust later, and the car passed.
>
> On Sat, 24 Jan 2004 18:14:02 GMT, Blue Moon <mfoco@hotmail.com> wrote:
>
> >I have a 1994 Jeep Grand Cherokee, 8 cylinder. I am having problems
> >with passing emissions inspection in north NJ (Sussex County). The
> >original results were:
> >
> >Gas Standard Reading Result
> >HC 100 27 Pass
> >CO% 0.50 0.69 Fail
> >CO2% 13.9
> >RPM 2668
> >
> >No figures were given for NOx or O2%.
> >
> >Okay, no big problem, thinks I. The following parts were replaced:
> >
> >Oil filter & oil
> >Air filter
> >8 Spark plugs
> >Plug wires (including the distributor/coil wire)
> >Oxygen Sensor
> >
> >A mechanic checked the vehicle out, and had a friend of his test
> >emissions. Despite the vehicle running excellently (no pings, knocks,
> >stalls, bad starts, dirty exhaust etc.) they could only get the CO%
> >down to about 0.51 - 0.52.
> >
> >He tested a load of parts, and reported the following:
> >
> >1. Fuel pressure test - ok
> >2. Coolant temp sensor - ok
> >3. PCV - ok
> >4. Air filter - new
> >5. EGR - 100% working ok
> >6. B-map - ok
> >7. TPS - ok
> >8. Injector Balance - ok
> >9. Plugs, Wires - New
> >10. Throttle body - cleaned, ok
> >11. AIS Motor - ok
> >12. Air control motor - ok
> >
> >He couldn't figure out what the problem was, but suggested I simply
> >put it through the test with a gallon of alcohol.
> >
> >I filled up the gas tank with Mobil Super +, and drove around for a
> >week to clean the fuel lines through. I filled up again with Mobil
> >Super +, added a quart of dry gas and a gallon of denatured alcohol
> >(so I'm guessing the tank would have had about 4% - 5% alcohol), drove
> >it 15 miles and put it through inspection.
> >
> >To my amazement, I got the following results:
> >
> >Gas Standard Reading Result
> >HC 100 30 Pass
> >CO% 0.50 0.61 Fail
> >CO2% 14.1
> >RPM 2430
> >
> >I'm like .... WTF????
> >
> >I've been told the local gas stations are putting additives in the gas
> >in this area due to the weather, and a lot of cars are losing fuel
> >consumption and failing emissions inspections. But this is
> >ridiculous. I can hardly import a tank of gas from Florida, so what
> >the hell else can I do to get this thing to pass?
> >
> >Any suggestions gratefully received, short of "move to a state with
> >less draconian measures".
>
> --
> Blue Moon

 

Go to the parts store and buy the emissions system pass in a can. It will
enable a cleaner burn just follow the directions on the can. If you are
burning oil your co2 will increase however, your cat converter should get
hot enough to cook off minor oil burning. Your cat converter may be going
bad also.

--
HarryS
JAFGBR
"Blue Moon" <mfoco@hotmail.com> wrote in message
news:1368716527259d1b83c9c2207ed01523@news.teranew s.com...
> It turned out that the problem was with the catalytic convertor.
> Although the NOx was low, the convertor itself was apparently
> installed wrongly. A new cat and exhaust later, and the car passed.
>
> On Sat, 24 Jan 2004 18:14:02 GMT, Blue Moon <mfoco@hotmail.com> wrote:
>
> >I have a 1994 Jeep Grand Cherokee, 8 cylinder. I am having problems
> >with passing emissions inspection in north NJ (Sussex County). The
> >original results were:
> >
> >Gas Standard Reading Result
> >HC 100 27 Pass
> >CO% 0.50 0.69 Fail
> >CO2% 13.9
> >RPM 2668
> >
> >No figures were given for NOx or O2%.
> >
> >Okay, no big problem, thinks I. The following parts were replaced:
> >
> >Oil filter & oil
> >Air filter
> >8 Spark plugs
> >Plug wires (including the distributor/coil wire)
> >Oxygen Sensor
> >
> >A mechanic checked the vehicle out, and had a friend of his test
> >emissions. Despite the vehicle running excellently (no pings, knocks,
> >stalls, bad starts, dirty exhaust etc.) they could only get the CO%
> >down to about 0.51 - 0.52.
> >
> >He tested a load of parts, and reported the following:
> >
> >1. Fuel pressure test - ok
> >2. Coolant temp sensor - ok
> >3. PCV - ok
> >4. Air filter - new
> >5. EGR - 100% working ok
> >6. B-map - ok
> >7. TPS - ok
> >8. Injector Balance - ok
> >9. Plugs, Wires - New
> >10. Throttle body - cleaned, ok
> >11. AIS Motor - ok
> >12. Air control motor - ok
> >
> >He couldn't figure out what the problem was, but suggested I simply
> >put it through the test with a gallon of alcohol.
> >
> >I filled up the gas tank with Mobil Super +, and drove around for a
> >week to clean the fuel lines through. I filled up again with Mobil
> >Super +, added a quart of dry gas and a gallon of denatured alcohol
> >(so I'm guessing the tank would have had about 4% - 5% alcohol), drove
> >it 15 miles and put it through inspection.
> >
> >To my amazement, I got the following results:
> >
> >Gas Standard Reading Result
> >HC 100 30 Pass
> >CO% 0.50 0.61 Fail
> >CO2% 14.1
> >RPM 2430
> >
> >I'm like .... WTF????
> >
> >I've been told the local gas stations are putting additives in the gas
> >in this area due to the weather, and a lot of cars are losing fuel
> >consumption and failing emissions inspections. But this is
> >ridiculous. I can hardly import a tank of gas from Florida, so what
> >the hell else can I do to get this thing to pass?
> >
> >Any suggestions gratefully received, short of "move to a state with
> >less draconian measures".
>
> --
> Blue Moon

 

Go to the parts store and buy the emissions system pass in a can. It will
enable a cleaner burn just follow the directions on the can. If you are
burning oil your co2 will increase however, your cat converter should get
hot enough to cook off minor oil burning. Your cat converter may be going
bad also.

--
HarryS
JAFGBR
"Blue Moon" <mfoco@hotmail.com> wrote in message
news:1368716527259d1b83c9c2207ed01523@news.teranew s.com...
> It turned out that the problem was with the catalytic convertor.
> Although the NOx was low, the convertor itself was apparently
> installed wrongly. A new cat and exhaust later, and the car passed.
>
> On Sat, 24 Jan 2004 18:14:02 GMT, Blue Moon <mfoco@hotmail.com> wrote:
>
> >I have a 1994 Jeep Grand Cherokee, 8 cylinder. I am having problems
> >with passing emissions inspection in north NJ (Sussex County). The
> >original results were:
> >
> >Gas Standard Reading Result
> >HC 100 27 Pass
> >CO% 0.50 0.69 Fail
> >CO2% 13.9
> >RPM 2668
> >
> >No figures were given for NOx or O2%.
> >
> >Okay, no big problem, thinks I. The following parts were replaced:
> >
> >Oil filter & oil
> >Air filter
> >8 Spark plugs
> >Plug wires (including the distributor/coil wire)
> >Oxygen Sensor
> >
> >A mechanic checked the vehicle out, and had a friend of his test
> >emissions. Despite the vehicle running excellently (no pings, knocks,
> >stalls, bad starts, dirty exhaust etc.) they could only get the CO%
> >down to about 0.51 - 0.52.
> >
> >He tested a load of parts, and reported the following:
> >
> >1. Fuel pressure test - ok
> >2. Coolant temp sensor - ok
> >3. PCV - ok
> >4. Air filter - new
> >5. EGR - 100% working ok
> >6. B-map - ok
> >7. TPS - ok
> >8. Injector Balance - ok
> >9. Plugs, Wires - New
> >10. Throttle body - cleaned, ok
> >11. AIS Motor - ok
> >12. Air control motor - ok
> >
> >He couldn't figure out what the problem was, but suggested I simply
> >put it through the test with a gallon of alcohol.
> >
> >I filled up the gas tank with Mobil Super +, and drove around for a
> >week to clean the fuel lines through. I filled up again with Mobil
> >Super +, added a quart of dry gas and a gallon of denatured alcohol
> >(so I'm guessing the tank would have had about 4% - 5% alcohol), drove
> >it 15 miles and put it through inspection.
> >
> >To my amazement, I got the following results:
> >
> >Gas Standard Reading Result
> >HC 100 30 Pass
> >CO% 0.50 0.61 Fail
> >CO2% 14.1
> >RPM 2430
> >
> >I'm like .... WTF????
> >
> >I've been told the local gas stations are putting additives in the gas
> >in this area due to the weather, and a lot of cars are losing fuel
> >consumption and failing emissions inspections. But this is
> >ridiculous. I can hardly import a tank of gas from Florida, so what
> >the hell else can I do to get this thing to pass?
> >
> >Any suggestions gratefully received, short of "move to a state with
> >less draconian measures".
>
> --
> Blue Moon