20V with Yanmar Diesel

[petrey10]

chpthrill's knowledge is amazing

[River Runner]

Actually:

3-way converter - platinum, palladium, rhodium to convert HC's, Co and NOX to Co2 and H2O. Which is the catalyst

Closed fuel system: Canister purge, cap, pressure/vacuum sensor on tank.EVAP

Closed cooling system: Pressure cap and 190* thermoBoth gas and diesel

ECM and related: Heated O2 sensors = at least 3 - one at the manifold, pre-converter, and post converter, ECT, MAP/Baro sensor, MAF sensor, TPS, Knock, Crank, Cam sensor, IAT (intake temp), etc.Both gas and diesel(some differences)

I'm sure there are more, i've just been out of the game too long

Now, as far a diesel being cleaner then gas, good question. They are too different to be able to do an apple to apples comparison. Diesel and gas do not produce all of the same emissions. With diesel, the 2 biggest culprits are sulfur emissions and carbon particulates. Both of which have been addresses heavily in the last 20+ years, both during the refinery of the fuel and on the vehicle itself. With gas, we have Co, HC's and NOX. These have also been addressed with how the fuel is refined (blended) and with the engines themselves.

My point was gas uses less emission controls than todays diesel. Gas is still cleaner. Diesels biggest enemy has always been particulates. Diesels best asset has been more miles per gallon of fuel, hence less Co2. Unfortunately because of new DPF systems more miles per gallon has gone out the window. When you dump raw fuel to burn particulates in the DPF you lose all your mileage gains.

[River Runner]

Cali didn't start doing emissions tests on Diesels till just this year.

Diesel is a lighter fuel, so it burns cleaner as well.

California emssion requirements for diesel do not include a tailpipe test or dyno test.

-Visual Inspection of Smog Components
-OBD II Check with scan tool
-Visual Smoke Check at 2500 RPM
-EVAP Test

BTW gasoline weighs 6.1 pounds per gallon and diesel is 7.1 pounds per gallon.(give or take)

[zad0030]

Fun Fact: Rudolf Diesel designed to run his engine on Peanut Oil.

[Domsz06]

California emssion requirements for diesel do not include a tailpipe test or dyno test.

-Visual Inspection of Smog Components
-OBD II Check with scan tool
-Visual Smoke Check at 2500 RPM
-EVAP Test

BTW gasoline weighs 6.1 pounds per gallon and diesel is 7.1 pounds per gallon.(give or take)

I thought Gman said he now has to get his diesel smogged?

I see where your coming from River Runner now and it does make sense and Your correct in your statements.

I also found out this information that proves I was even further from the truth lol. Good discussion!

http://www.wisegeek.com/what-is-diesel-fuel.htm

[Domsz06]

just some more interesting info on diesel on how it's more efficient, and cheaper (was before ULSD) and what not. Just interesting reading if you like...

http://www.wisegeek.com/what-is-the-...d-fuel-oil.htm

[River Runner]

I thought Gman said he now has to get his diesel smogged?

I see where your coming from River Runner now and it does make sense and Your correct in your statements.

I also found out this information that proves I was even further from the truth lol. Good discussion!

http://www.wisegeek.com/what-is-diesel-fuel.htm

Yes in California diesel is required to be "smogged". But the requirements dont include a tailpipe test. Kinda dumb but I think the powers that be dont have any real numbers(tailpipe emissions)that they can agree on and go by at this point. But I can see it coming in the future.

For now just a visual inspection, OBD test, and a gas cap test.

With so many folks modifying the diesels I think it should help a bit. Your going to find a lot of angry diesel owners even with a simple "chip" and no other modifications get booted even after they remove the aftermarket programming.

[Domsz06]

Yes in California diesel is required to be "smogged". But the requirements dont include a tailpipe test. Kinda dumb but I think the powers that be dont have any real numbers(tailpipe emissions)that they can agree on and go by at this point. But I can see it coming in the future.

For now just a visual inspection, OBD test, and a gas cap test.

With so many folks modifying the diesels I think it should help a bit. Your going to find a lot of angry diesel owners even with a simple "chip" and no other modifications get booted even after they remove the aftermarket programming.

yeah that is what I heard as well.

[chpthril]

Yes in California diesel is required to be "smogged". But the requirements dont include a tailpipe test. Kinda dumb but I think the powers that be dont have any real numbers(tailpipe emissions)that they can agree on and go by at this point. But I can see it coming in the future.

For now just a visual inspection, OBD test, and a gas cap test.

With so many folks modifying the diesels I think it should help a bit. Your going to find a lot of angry diesel owners even with a simple "chip" and no other modifications get booted even after they remove the aftermarket programming.

The theory behind the OBD code check and no sniff test is simple. We have so many sensor and engine management components and the ECM's are so fast, that IF the vehicle was operating in a manor that would produce exhaust emissions above the EPA/state limits, the ECM would set a "P" series (power train) code and eliminate the CEL. So, when the tech pulls the vehicle in and plugs up the ODB interface, the code is detected and the vehicle fails.

What's that you say, why dontcha just erase the code before the test? WRONG The OBDII ECM's are designed to tell on ya if the codes have recently been cleared. There are a series of Inspection/Maintenance "Flags" that get reset when the codes are cleared. In order to get the flags to "drop", the vehicle has to be driven through a series of drive cycles. This can not easily be done, even by those that have the drive cycles printed out in hand. The theory is, if there is indeed a fault that set the code, it will return before the flags are dropped, and once again the code will be detected and the test will fail.

[River Runner]

The theory behind the OBD code check and no sniff test is simple. We have so many sensor and engine management components and the ECM's are so fast, that IF the vehicle was operating in a manor that would produce exhaust emissions above the EPA/state limits, the ECM would set a "P" series (power train) code and eliminate the CEL. So, when the tech pulls the vehicle in and plugs up the ODB interface, the code is detected and the vehicle fails.

In theory that is correct. However, I have had more than one car in my lifetime fail the "sniffer" and pass everything else. Its rare though.

Also have failed vehicles with "P" codes that really have no effect of emissions. More common than the above but still rare.

[chpthril]

In theory that is correct. However, I have had more than one car in my lifetime fail the "sniffer" and pass everything else. Its rare though.

Exactly, and those are like a rain drop in the ocean.

Also have failed vehicles with "P" codes that really have no effect of emissions. More common than the above but still rare.

There are many codes, such as those related to the EVAP system, that would have 0 effect on tailpipe emissions, but could be releasing HC (raw gas fumes) to the atmosphere. EGR related codes could be resulting in the formation of NOX, which will almost never be detected by an idle sniff test. Even during a CA IM240 drive test, NOX could be hard to produce, simply because a fan is placed in front of the vehicle forcing air through the engine compartment during the Dyno test. Excessive heat is one of the main ingredients needed to for NOX.

Here in NC, we have stopped sniffing OBDI (1995 and older) vehicles because there are so few on the roads, based on DMV records, that they are not contributing to the pollution, no matter how bad the are running.

[River Runner]

There are many codes, such as those related to the EVAP system, that would have 0 effect on tailpipe emissions, but could be releasing HC (raw gas fumes) to the atmosphere. EGR related codes could be resulting in the formation of NOX, which will almost never be detected by an idle sniff test. Even during a CA IM240 drive test, NOX could be hard to produce, simply because a fan is placed in front of the vehicle forcing air through the engine compartment during the Dyno test. Excessive heat is one of the main ingredients needed to for NOX.

Here in NC, we have stopped sniffing OBDI (1995 and older) vehicles because there are so few on the roads, based on DMV records, that they are not contributing to the pollution, no matter how bad the are running.

What I was refering to were transmission related codes. Those you mentioned have definite impact for smog testing.

EVAP is a big deal here in California. LPFET (Low Pressure Fuel Evaporative Test) are used for vehicles 1976-1995.

New EVAP systems work amazingly well at finding even the smallest leaks within the system.(pain in the butt to find sometimes)

All applicable vehicles get the dyno in California. If the vehicle is AWD, too big...etc they get a two speed test.

Most failures that do not set OBD code but fail the dyno or two speed test have excessive NOx. Almost always EGR related. 4.0L Rangers did have a problem with carbon buildup in the cyl head which caused occasional trouble on higher mileage vehicles.(nothing a little splash of water down the intake wouldnt clean up)

The others that fail without OBD codes usually have a MAF issue thats within parameters with a incorrect BARO reading.

[chpthril]

What I was refering to were transmission related codes. Those you mentioned have definite impact for smog testing.

EVAP is a big deal here in California. LPFET (Low Pressure Fuel Evaporative Test) are used for vehicles 1976-1995.

New EVAP systems work amazingly well at finding even the smallest leaks within the system.(pain in the butt to find sometimes)

All applicable vehicles get the dyno in California. If the vehicle is AWD, too big...etc they get a two speed test.

Most failures that do not set OBD code but fail the dyno or two speed test have excessive NOx. Almost always EGR related. 4.0L Rangers did have a problem with carbon buildup in the cyl head which caused occasional trouble on higher mileage vehicles.(nothing a little splash of water down the intake wouldnt clean up)

The others that fail without OBD codes usually have a MAF issue thats within parameters with a incorrect BARO reading.

Although you wont see many transmission related P codes creating excessive taipipe emissions, the reason they are a fail on an OBD test is this: trans slip = higher engine rpm = more fuel used and more exhaust out of the tailpipe. Although these PPM reading are withing limits, they are equal to additional traffic and increased fuel consumption. So, in a round about way, they doo effect emissions.

And yes, chasing EVAP leaks are just about the worst. I loved using the sonic ear muffs to listen for leaks

[River Runner]

And yes, chasing EVAP leaks are just about the worst. I loved using the sonic ear muffs to listen for leaks

Old school....

We use a smoke machine these days. Makes it much easier. Hardest part is getting to the failed component.

[chpthril]

Old school....

We use a smoke machine these days. Makes it much easier. Hardest part is getting to the failed component.

I'm not that old But yes, we did have the smoke machine with the ultra violant die and cool yellow glasses

Either way, the leaks were always on top of the tank, so it had to be dropped down. Big thanks to all the customers that felt it was a good idea to top off the tank before their appt