And how does one find an.. *ahem* shady smog shop? Hmmmmmm?

 

Is your air mass sensor working? If not, that would make your car run etremly rich!!!

 

I am not sure about the mass air sensor. I am not even sure that the 87 NA has them. It has an AFM. But I check the ACV today and it seems to be shot. As for a shady smog shop...All the emissions testing in AZ is run by the government. Doesnt work that way!

 

OK- I have had the sam problem- you are running very rich- your cat won't do a thing if raw gas is going through the exhaust, and gas IS hydrocarbons, making the sniffer register REAL high!!
My car is running rich- I'm right in the middle of tracking it down- I am trying a new ECU, and lots of other things.
First off- your O2 sensor won't help at idle- you car ignores it (open loop at idle!!?)
If you have a digital volt meter, hook it up to the wire on your o2 sensor, and look at the reading- at idle it should be like .4-.6V. any more and it's running rich.
You have a variable resistor you can use to lean out the idle, but rich running under throttle could be a LOT of things
ECU, wires,sensors,fuel pressure, regulator, leaky injectors, blah blah.
Do an ECU harness check as per the http://Fc3s.org site, it'll tell you if any of your sensors or wires are returning a bad reading to the ECU.

Also- if you car has been running this rich for a while, your cat may be fried (actually burnt/used up) and might need to be replaced anyways.
What I did (I'm a HACK!!) is I cut a hole in the air intake AFTER the AFM, so there was a lot more air going into the engine than the ECU thought, leaning out lkke crazy.
It worked! Brought me from a ridiculous fail (as bad as yours) to a nice clean pass. I also vented the air pump FULLY to the cat. Lots of fresh air helps to... Lots of way s to fool the sniffer.
Good luck



Good luck

 

well, first off...I am running rich ALL the time..Its worse it idle. I did a check on the ACV, and its toast...The motor is brand new, so the cats should be okay. We shall see. If we cant squeek it past with a new ACV, I am gonna borrow someones cats (hopefully) to get it through.

 

I just heard a rumor that you can just get a P.O. box up north and register in show low.. rumor has it they have no emissions.

Anyone know for sure?

 

All you have to do is get a street address in pretty much any area other then Pima County or Pheonix Metro from what I hear...

 

You should start with that service that you are planning. But after that: I don't know on 2nd gen's if they have that charcoal can purge setup. I was failing both HC and CO up in Phoenix on my 3rd gen I disconnected the hose from the charcoal can then I passed CO and barely failed HC. Then I let the gas tank get less than half and poured 3 bottles of 99% rubbing alcohol into the tank. I passed so well they short tested me. Just be sure to go fill the tank afterwords cause your car will be running like a dog.

 

Yeah, I just found out that the ACV was bad, so I got one from the junkyard...The damn dealers want $580 for that damn thing. All you people out there in non-emissions states need to hold on to those ACVs!!! You could make money off us poor people!

 

My car ( no emissions cahmp itself) smells like gas REALLY bad if it's been flooded. The oil can be really stinky from gas too..... no gas leak here though...

Cory Waters

 

Hi,

I live in arizona and failed emissions 3 times until I read one of the papers I got from the emissions place. I went to Blackwell Automotive and they work with maricopa county and they pay up $500.00 of the work they do, but I think they charge a $50.00 inspection fee. I was suprised they new so much about rx-7's They replaced alot of my parts and the total price was $1200.00 but I only had to pay $700.00 because they pay $500.00 of it. Oh and there are a couple other places you can go to in the phoenix area but you have to call the number on one of those sheets they hand you. If you cant find it I may be able to find it.

Thanks
John

 

Are you saying that you can get your car emission tested at one of these state authorized shops and Maricopa county will help you pay for the fix? Do you have to fail a certain number of times before you can do this or can you do it after you fail the first time? By the way, what did you replace that totally $1200?

 

Here is the result....Its in .gif format. And for the Government funded emissions repairs, you have to meet certain qualifications. Like the car being in AZ for 12 years. I got the car from Cali...So I am screwed..

 

hey hozz, how apparent is the smell of gas when the pulsation goes bad? I could smell gas in my car real bad one day, and even worse when I popped the hood, it was terrible comin right from the damper. So I just replaced the fuel line that is right in there, and since that day its never leaked and I havent smelled gas even when I run it hard and smell right in that area. I was just wondering if Ill definetely smell it first.

 

Hi,

Yes you can get it done if it has failed once or twice or whatever. My car has not been in arizona fo 12 years. I just bought it about 2 years ago and it was from Ohio.ActuallyI have the Maricopa county voluntary vehicle repair and retrofit program right in my hand. It says the car has to be at least 12 years old to qualify for assistance. If it is a 1987 it will work. The number is (602)506-6016. I cant remember what they replaced but I took it to mazda the first time and they said it was the ACV but blackwell said it wasnt. It passed perfectly and they guarentie it or they fix it again.

John

 

Man, I replaced the ACV, new plugs, wires, oil, oil filter, air filter, and O2 sensor..All that stuff. And I am still running rich...You can smell the gas at the tailpipes. Any ideas?

 

Hi,

On my car they replaced the air bypass valve the air diverter valve the catalytic converter they adjusted the air flow meter they adjusted the throtle. thats really about it. You might want to check those.

John

 

Air bypass/air diverter? Havent heard of those. While I was working on the vehicle last night, I accidently broke the 1-way valve that went to the "double throttle diaphram" What does this do?

 

Thats a *vacuum delay valce* (plastic? green and white?). There is a check out of it in the fuel section of http://www.iluvmyrx7.com/Technical_I...ice_manual.htm but for your direct question, no I don not really know why it exists. Probably to maintain a constant vacuum on the double throttle diaphram during cold weather startups. It should have a constant vac holding the throttle plates towards the close position until the thermo-wax device stops the vacuum to the diaphram. Once the car is up to proper temp, I don't think the double throttle comes into play anymore. Fairly sure of that.
I don't believe there is an adjustment of the air flow meter.AIRBYPASS... maybe they were talking about the bac, who knows. The AIR DIVERTER. Got me, does not ring a bell. Some people have *trick* names for parts that do not coincide with the correct name. P.S...the cat is starting to look suspect. Do you have a digital meter??????? Reason for asking.

 

I have a voltmeter, a boatload of LEDs to make some lights, I have a soldering kit (I am a digital electrician by trade), and if I dont have it, I can get it. The problem that I am having right now, is that the car just SMELLS like its running very rich. But I am not getting any black smoke out of the tailpipes, the car starts up and runs awsome. No hesitation, has plenty of power (at least it seems so, I dont really have anything to compare it with). Basically, if I dump the clutch at the line, I am smoking tires. If I power shift to second, the car burns them again. So I assume its running right. I replaced the ACV, and it seems that there IS air getting to the cats. The local guy down here (RX for your 7 is the name of the place) says that these cars are made to run rich. Thats fine with me but DAMN!! How the hell are you supposed to get through emissions? All those guys in non emissions states are sitting on a parts GOLDMINE!!!!

Rat

 

Hmm. It could be running rich. Or, you have an exhaust leak. My T2 never smells like gas or exhaust inside when I floor it, however my downpipe gasket is leaking and I now smell fumes when I floor it.

Check your gaskets for ticking. Your car should pass smog if you have no mods.

 

I think I may have some exhaust leaks, but the rich smell is coming from the tailpipes.

 

Here is the test result...

 

Were you ever able to pass emissions?

Firestarter

 

NO, I t appears that the morons that built my motor switched the front and rear rotor housings. this pretty much negated the ACV and EGR functions. So there is pretty much no way I can pass.... Maybe with a new cat, but I doubt it.