Cheating The SMOG TEST! made simple.
02-09-10, 02:10 PM
#26
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,805
Received 2,578 Likes
on
1,831 Posts
02-09-10, 02:13 PM
#27
The best trick to pass emissions is to fix your car...
02-09-10, 07:38 PM
#31
Senior Member
iTrader: (2)
Join Date: Dec 2008
Location: lynnwood, WA
Posts: 387
Likes: 0
Received 0 Likes
on
0 Posts
just wondering..since this works on cars that have emission equipment...im assuming it would work on cars that have all emissions removed right?? just wondering
02-10-10, 10:39 AM
#36
if your hc (hydrocarbon btw) is high, then start looking at fuel system pressure and if your tps is tuned properly.
your co (monoxide) is slighty high.
so, just looking at those 2 gases right there tell me that its running rich....just lean out the system a tiny bit.
your co was higher than my 7 ever was, mine passed with 160xxx original miles, aftermarket filter but all emissions systems present, my readings were as follows (and running 87octane)
hc- 13ppm
co- .04 (%)
i dont remember what the co2 and the o2 were, but nox were around 110 and passing was ~700.
anyways, looks like your engine is running a bit rich, should have just dialed back the tps a tiny bit and you would have been fine. also, did you make sure to check the secondary air system? might have been an issue
what was your nox?
Lloyd
p.s can someone either delete this thread or rename it?
your co (monoxide) is slighty high.
so, just looking at those 2 gases right there tell me that its running rich....just lean out the system a tiny bit.
your co was higher than my 7 ever was, mine passed with 160xxx original miles, aftermarket filter but all emissions systems present, my readings were as follows (and running 87octane)
hc- 13ppm
co- .04 (%)
i dont remember what the co2 and the o2 were, but nox were around 110 and passing was ~700.
anyways, looks like your engine is running a bit rich, should have just dialed back the tps a tiny bit and you would have been fine. also, did you make sure to check the secondary air system? might have been an issue
what was your nox?
Lloyd
p.s can someone either delete this thread or rename it?
And by TPS do you mean Throttle position sensor? Ive been trying to get my car to run a bit more lean because I have always thought it smelled kinda rich even for a RX7, so ive been trying to figure out how to lean it out, but I didnt want to mess with any settings because I did so in the past and it totally killed it for a while till I dialed it back. (i accidentally messed with the Variable resistor messing up the idle mixture making it flood.)
02-10-10, 12:13 PM
#37
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,805
Received 2,578 Likes
on
1,831 Posts
the split air pipe is used for some cruising situations, and decel.
this is in the manual, BTW. EVERY 81-95 rotary engine works like this
an emissions test is run between 2500-2800rpms, the air pump air goes to the exhaust ports car passes.
the split air pipe does NOTHING during an emissions test, it can be removed/blocked off with NO EFFECT on the emissions numbers.
02-10-10, 03:39 PM
#39
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,805
Received 2,578 Likes
on
1,831 Posts
port air!
02-10-10, 06:47 PM
#40
if the car is functioning properly, from idle to about 2500-3000rpms, the air pump air is going into the EXHAUST PORTS.
the split air pipe is used for some cruising situations, and decel.
this is in the manual, BTW. EVERY 81-95 rotary engine works like this
an emissions test is run between 2500-2800rpms, the air pump air goes to the exhaust ports car passes.
the split air pipe does NOTHING during an emissions test, it can be removed/blocked off with NO EFFECT on the emissions numbers.
the split air pipe is used for some cruising situations, and decel.
this is in the manual, BTW. EVERY 81-95 rotary engine works like this
an emissions test is run between 2500-2800rpms, the air pump air goes to the exhaust ports car passes.
the split air pipe does NOTHING during an emissions test, it can be removed/blocked off with NO EFFECT on the emissions numbers.
an ASM (acceleration simulation mode) is run between 15mph and 25 mph, the rpm can vary between 1600 and 3200, depending on if he wants to put it into 3rd gear. most tests are run in 2nd gear, but alot run in 3rd gear lowering the rpms. the SAP does matter, because it must be present as part of the emissions system, if it is blocked off and the machine prompts the tech for emissions devices, and sees that it is not there, FAIL, for modification or tampering of emissions devices.
why dont you try your theory in californa (in an enhanced area county), block it off, then try to pass, 98% chance youll fail, depending on if the tech does his job, i know i would catch it. but im **** enough to actually look under the car for the cat, im not risking my $ and smog EA for being lazy
Lloyd
02-11-10, 09:44 AM
#41
ASM 25/25 tests are ran at 25 mph or 40 km/h at 25% load. Our manuals say to keep any 5 speed you can in 2nd gear for the test I found with a lot of cars they're at 2700-2900 RPM. But some Hondas and Mazdas cause they have such tall gear ratios for acceleration you gotta run um in 3rd because at 25 mph/40 km/h they're over 3000 rpm (which is the limit).
He is right about what he said a 2 speed idle test is ran between 2500-2800 though I think on my machine anything about like 2750 is over limit. My guess is his car has always been too low to run on the dyno or has a body kit or something of the sorts preventing it from being run on an above ground or in ground dyno. OR it has no safe place to strap it down.
Under these circumstances a car that is supposed to run an asm 25/25 a 2 speed idle test will suffice.
Also is California the only place they even inspect emissions equipment? Here we're taught to just ignore any tampering and put N/A for everything on the list.
He is right about what he said a 2 speed idle test is ran between 2500-2800 though I think on my machine anything about like 2750 is over limit. My guess is his car has always been too low to run on the dyno or has a body kit or something of the sorts preventing it from being run on an above ground or in ground dyno. OR it has no safe place to strap it down.
Under these circumstances a car that is supposed to run an asm 25/25 a 2 speed idle test will suffice.
Also is California the only place they even inspect emissions equipment? Here we're taught to just ignore any tampering and put N/A for everything on the list.
02-11-10, 10:19 AM
#42
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
The split air and port air work on non turbos as shown in the jpg attached.
The split air pipe and air going thru it have very little to do with the emissions tests. During the low speed test the airpump air goes to the exhaust ports and little to none to the split air pipe.
During the high speed test the rpms get over the 1500 rpm threshold and when that happens the 02 sensor goes into closed loop which in turn means the afr that WAS approx 13afr is now closer to the 14.7afr which in turn means the converter can convert more efficiently.
When the ACV is in RELIEF mode little if any air can make its way into the split air pipe 'cause there ain't no pressure to push it thru the split air pipe, the air pump air and its pressure is being dumped into the silencer in the right front fender.
Connect a hose to the split air pipe and run it into the cabin. Then go drive the car over a range of speeds. The amount of air when sent to the spit air pipe has never impressed me except to think of the word anemic.
Turbo ACV work similar to the jpg attached but not exactly. Similar is the key word.
IF one has a RTEK 2.1 he can monitor the switching and relief solenoids and the port air solenoids while driving. Just when you think you got it figured out the 120 seconds of driving steadily will undo what you thought you knew. See jpg for 120 seconds.
50*C is 122*F.
The two speed test in Tx is done at speeds similar to the ones shown in the attached jpg, although my memory tells me usually the high speed is usually close to 2300 rpm and not what is shown in the jpg attached.
The split air pipe and air going thru it have very little to do with the emissions tests. During the low speed test the airpump air goes to the exhaust ports and little to none to the split air pipe.
During the high speed test the rpms get over the 1500 rpm threshold and when that happens the 02 sensor goes into closed loop which in turn means the afr that WAS approx 13afr is now closer to the 14.7afr which in turn means the converter can convert more efficiently.
When the ACV is in RELIEF mode little if any air can make its way into the split air pipe 'cause there ain't no pressure to push it thru the split air pipe, the air pump air and its pressure is being dumped into the silencer in the right front fender.
Connect a hose to the split air pipe and run it into the cabin. Then go drive the car over a range of speeds. The amount of air when sent to the spit air pipe has never impressed me except to think of the word anemic.
Turbo ACV work similar to the jpg attached but not exactly. Similar is the key word.
IF one has a RTEK 2.1 he can monitor the switching and relief solenoids and the port air solenoids while driving. Just when you think you got it figured out the 120 seconds of driving steadily will undo what you thought you knew. See jpg for 120 seconds.
50*C is 122*F.
The two speed test in Tx is done at speeds similar to the ones shown in the attached jpg, although my memory tells me usually the high speed is usually close to 2300 rpm and not what is shown in the jpg attached.
02-11-10, 03:33 PM
#45
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,805
Received 2,578 Likes
on
1,831 Posts
what are you talking about? you clearly have 0 experience with smogs.
an ASM (acceleration simulation mode) is run between 15mph and 25 mph, the rpm can vary between 1600 and 3200, depending on if he wants to put it into 3rd gear. most tests are run in 2nd gear, but alot run in 3rd gear lowering the rpms. the SAP does matter, because it must be present as part of the emissions system, if it is blocked off and the machine prompts the tech for emissions devices, and sees that it is not there, FAIL, for modification or tampering of emissions devices.
why dont you try your theory in californa (in an enhanced area county), block it off, then try to pass, 98% chance youll fail, depending on if the tech does his job, i know i would catch it. but im **** enough to actually look under the car for the cat, im not risking my $ and smog EA for being lazy
Lloyd
an ASM (acceleration simulation mode) is run between 15mph and 25 mph, the rpm can vary between 1600 and 3200, depending on if he wants to put it into 3rd gear. most tests are run in 2nd gear, but alot run in 3rd gear lowering the rpms. the SAP does matter, because it must be present as part of the emissions system, if it is blocked off and the machine prompts the tech for emissions devices, and sees that it is not there, FAIL, for modification or tampering of emissions devices.
why dont you try your theory in californa (in an enhanced area county), block it off, then try to pass, 98% chance youll fail, depending on if the tech does his job, i know i would catch it. but im **** enough to actually look under the car for the cat, im not risking my $ and smog EA for being lazy
Lloyd
i have smogged a few cars with no split air pipe. its not theory i have done it. you are right it fails the visual, but it doesn't affect what comes out of the tailpipe during the test.
also the test is not run BETWEEN 15 and 25, its run AT 15 and AT 25 mph. try it with any rx7, 15mph in 2nd is almost the same rpm as 25rpm in 3rd, its usually around 2800 for both.
again i don't cheat the test, i just make sure the ACV is working like the FSM says it should, and everything passes really easily, especially the EFI cars.
if you were closer i'd actually be happy to show you
mike
02-12-10, 01:54 AM
#47
relax guys, there is no law that sais you HAVE to run gasoline in your car. it may be a cheat but the smog ***** can't do anything about it.
fixing the problem is probably the best idea though, since obviously wasting gas or running on failing cat isn't a great idea anyways.
fixing the problem is probably the best idea though, since obviously wasting gas or running on failing cat isn't a great idea anyways.
02-12-10, 10:59 AM
#49
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,805
Received 2,578 Likes
on
1,831 Posts
(good enough trade off for me)