Thanks for sharing Mr.Romero
From another Mr.Romero
Spike, you just can't leave it alone don't you? I mean the alcohol can.
Smog "hypothetical"
- Thread starter NLXTACY
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Thanks for sharing Mr.Romero
From another Mr.RomeroSpike, you just can't leave it alone don't you? I mean the alcohol can.
My buddy went to HD a few weeks back and bought a gallon of DA. He then mixed it at a ratio of 6:1, drove about 20 minutes to a smog shop, and passed! Smog guy told him his rig(62)had test results of a new car.
Two years ago he passed by a hair, as all his readings were at the limit. He's done nothing to the rig since the last smog check. So I guess this is not a myth, as it really does work.
I wasted close to $400. dollars on new CAT's about a month ago, and passed with ease. After reading this, I feel I've wasted $400.
Two years ago he passed by a hair, as all his readings were at the limit. He's done nothing to the rig since the last smog check. So I guess this is not a myth, as it really does work.
I wasted close to $400. dollars on new CAT's about a month ago, and passed with ease. After reading this, I feel I've wasted $400.
The guy behind you in traffic won't think so ...
I don't know that the guy behind me likes the smell of rotten eggs either, as my new cats are stinky.
But I only drive the rig a 100 miles a month, so it still has that new Cat smell.
An interesting thing happened to my friend and his 60 today. He accidentally spilled a gallon of DA into a 1/8th full tank last night, got things highway hot this morning, and found himself at the Star Station for a smog check.
(DA was introduced as insurance b/c CO levels were barely OK last time around.)
Result: residual O2, HC, and CO were positively excellent but NOX was through the roof: 2224 (743 max) at 15mph and 1930 (751 max) at 25mph. Gross Polluter once again.
Now he expected NOX to go up somewhat with the alcohol, but this is crazy. It suggests a super-lean and hot condition but he is thinking it may be the alcohol. NOX levels have been very good on previous tests, even when things are ugly elsewhere. He figured there was plenty of breathing room.
Truck has no known vac leaks (pulls 20 Hg), running temp consistently good as per IR sensor and the idiot gauge. Went through the emissions system last time around and with the exception of the EGR cooler gasket all was well (replaced that).
I'll be checking the function of the EGR as per the emissions manual but any thoughts on this? Barring hazardous chemicals being introduced to the fuel system, it seems like the EGR is often the culprit when it comes to high NOX.
Could the ratio of DA to gas (89) be the issue or at least part of it?
Did getting highway hot just double down the NOX issue?
Can someone just wave a magic wand and make it all better?
Thanks,
DF
(DA was introduced as insurance b/c CO levels were barely OK last time around.)
Result: residual O2, HC, and CO were positively excellent but NOX was through the roof: 2224 (743 max) at 15mph and 1930 (751 max) at 25mph. Gross Polluter once again.
Now he expected NOX to go up somewhat with the alcohol, but this is crazy. It suggests a super-lean and hot condition but he is thinking it may be the alcohol. NOX levels have been very good on previous tests, even when things are ugly elsewhere. He figured there was plenty of breathing room.
Truck has no known vac leaks (pulls 20 Hg), running temp consistently good as per IR sensor and the idiot gauge. Went through the emissions system last time around and with the exception of the EGR cooler gasket all was well (replaced that).
I'll be checking the function of the EGR as per the emissions manual but any thoughts on this? Barring hazardous chemicals being introduced to the fuel system, it seems like the EGR is often the culprit when it comes to high NOX.
Could the ratio of DA to gas (89) be the issue or at least part of it?
Did getting highway hot just double down the NOX issue?
Can someone just wave a magic wand and make it all better?
Thanks,
DF
So taking in the 80 for a smog check next week, there is appx 1/2 tank of regular should I top off with premium and add a gallon of DA, it's running great and no cel
Hypothetically, the higher the concentration of DA the cleaner the burn.
Of course... hypothetically speaking
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- #34
It's not ideal to run so much alcohol thru the system. If you have half a tank then theoretically run half a gallon.
Is it better to have a full tank for when they pressure test the fuel tank?
If a person accidentally filled the tank with E10 (by accident) on the day of the smog test, there would be a 10% mixture of ethanol in the gas tank. No need for a trip to Home Depot.
The EVAP test checks for a pressure drop (leak) when the gas tank is pressurized with nitrogen.
The less gasoline there is in the tank, the more volume of air it contains. A small vapor leak from a mostly empty gas tank will be more difficult to detect than one that is full of fuel.
The EVAP test checks for a pressure drop (leak) when the gas tank is pressurized with nitrogen.
The less gasoline there is in the tank, the more volume of air it contains. A small vapor leak from a mostly empty gas tank will be more difficult to detect than one that is full of fuel.
Isn't Smog the dragon from Lord of the Rings?
You got that backwards. NOx happens from high combustion temperatures. Gasoline has 2 more carbon atoms and 12 more hydrogen atoms than ethanol, and about 1.5 times the amount of chemical energy than that of ethanol.
The reason you run it, is there are less carbon atoms to make CO, less Hydrogen and thus less unburnt hydrocarbons and a cooler reaction to reduce NOx emissions.
As for this test, I like to have it down around 3-4 gal gas per gal ethanol. Or if there is E85 in your vicinity, wait till you're almost empty and put a few gallons of that in the tank.