existanzrx7

iTrader: (8)

I went to emissions a week ago with no air pump to the cat and no main cat and did not pass. Well I installed the air pump and main cat connected the air pump to the main cat but still didn’t pass I failed here is the results. Thanks

GoRacer

iTrader: (2)

ok, I can understand no airpump if it's broken or you are simgle but how did you logicaly expect to pass without a cat? Were you running a pre-cat and a strait pipe?

existanzrx7

iTrader: (8)

Those results are from the second time with the air pump and main cat.

Sgtblue

iTrader: (16)

Just thinking of stuff that might be helpful to know......

Does the airpump seem to be working properly?
Are you on a stock ECU?
OEM Cat? Used or New? If aftermarket, what type?
Last tune up? Plugs, wires etc?

misterstyx69

iTrader: (142)

run it as lean as you can.run the car hard..out on the highway at least a half hour before the test and JUST before you go in...put a gallon of denatured alcohol into three gallons of fuel.(test only)..fillup after though and here's more to read ....https://www.rx7club.com/search.php?searchid=1646174.

Wing0

i would also recomend an oil before you get it tested again..with the alcohol it may work but its not good for seals and causes corrision.

existanzrx7

iTrader: (8)

Does the airpump seem to be working properly?
Are you on a stock ECU?
OEM Cat? Used or New? If aftermarket, what type?
Last tune up? Plugs, wires etc?




Yes the air pump is working I can hear it inside the car, the ECU is stock, the cat is used but its a stock main cat also the car just got a Mazda remand engine with 150 miles on it so far so everything should be new or fairly new.

GoRacer

iTrader: (2)

Rebuilt/reman engine does not mean all new parts. Only the block is touched, everything else in the engine bay is the same milage used stuff it previously had. Rebuilt engines can and most likely have used parts inside (that meet Mazda specs). I'm not sure if you can hear the air pump inside the car. The only time I remember hearing mine is when it went bad. Have you listened for it with the hood open and watching the motor? If there is a grinding noise oe smoke then the wheel isn't moving and it's broke. Doesn't look like they check for NOs, so EGR shouldn't be an issue. Your main cat may be too old and clogged. Triple check your smog pump, then replace cat with metalic one from canada, replace plugs, add alchohol on almost empty tank (it's expensive and at 3:1 you don't want to buy 10 gal @ $10/gal).

misterstyx69

iTrader: (142)

the rotary engine has hotter exhaust temps than a Piston engine..it will bur na cat out in half the time..so Gettin a new catalytic will help immmensely..Don't rely on the one that the car came with..(it's almost twenty yrs old)..Get a New Cat..one with the air tube so you can hook the air pump to the Cat..to pump oxygen to the cat and dillute the exhaust..and Denatured alcohol will harm your engine Over TIME..not for the Five minutes it takes to do the Test..Tons of info here..I sent ten pages your way..just punchin in Failed emissions..I would love to see an engine that miraculously corroded in five minutes..funny how so many people have used the same method because they needed "the Edge"..and they are now driving around on corroded blown-up engines that Actually Past the emissions Test..

existanzrx7

iTrader: (8)

Thanks guys I will try the Alcohol.

rynberg

Frankly, I'm always amazed by how common these "tricks" are posted in order to pass emissions.

I live in Cali, which has the toughest emissions requirements of any state -- you even have to run the car on a dyno at 15 and 25 mph -- not just an idling sniffer test. I passed at nearly the minimums when I had the stock ecu and main cat (with over 60k on it), with several bolt-ons. I passed the test last fall with a fresh rebuilt streetported motor, richly tuned PFC, hi-flow cat, and all of the other mods in my sig.

If your car isn't passing, I would track down why it isn't running properly, rather than trying to use tricks like alcohol. Just my 2 cents.