So what happens if a main component is NLA from mazda and no aftermarket part is available for it ...EGR
my egr is faulty and the CEL is on due to code 16? What ever the number is its the egr last i checked. Cant pass smog cause broken egr.. cant replace cause mazda is NLA .. my FD is a 94 ca car

what do ?

 

You don't need a functioning egr to pass CA smog. If you check see the egr gasket picture the hole for it is TINY.
You can find a non-CA ecu and install it on your car and it won't get the CEL code for the egr.
Or you can do the egr relay bypass to stop the check engine light from coming on.

fix here:
https://www.rx7club.com/3rd-generati...ix-egr-345468/

 

But this is legitimate issue. Can i present this to the dmv and get a smog exemption or somthing lol they cant tell me to **** off and get another car becuse my manufacture stop making a emission part right ? Lol

 

For your specific situation, maybe there's someone nearby who has taken off their EGR valve that you could replace your broken one with?
I dunno if that works... I may have one hanging around from my "For Off-Road Use Only" car if you want me to look.

Or, I RockAuto has an aftermarket EGR valve:
https://www.rockauto.com/en/catalog/...egr+valve,4968

I don't know if it works with California ECU and will allow your CEL to go off, though. And it's a lot!

But, yes, I see the problem that you're presenting. But knowing the California DMV and their usual reaction when presented with logic, you're not gonna get anywhere with them. They will just stare at you blankly.

 

thank you for the help ! I read on some place that it might be gunked up and cleaning it will help
if not my last resort was to buy a 94 non ca ecu to run it.
ill check it out once i remove it, ill keep you in mind good sir thanks

 

Check the harness and plug, and try physically inspecting the switch first per the FSM diagram on page F-127.



If not install the relay as mentioned in the other thread:



arguing with CARB will probably be the most time consuming and frustrating option.

 

You should be able to find a good used one or clean yours to get it working. I probably have one floating around the garage somewhere.

93 cars either had the "plain" EGR or were California-spec and had the fancy EGR.

All 94 cars had the fancy EGR.

95 I THINK they got rid of EGR.

So, your options -

- Try and clean your EGR to get it working. May want to get a new gasket.
- Get a good used EGR with the sensor.
- Get another ECU, either a 93 non-Cali ECU or a PowerFC or something. You can rig up the PowerFC to light the Check Engine light on key on.
- Move .

Dale

 

You might want to contact the Bureau of Automotive repair and ask if there is an exemption, however even if there is the process will be tortuous in a big way.

This kind of issue will become a bigger problem for us CA owners as the catalysts wear out, there is no OEM replacement for these either and also no CARB approved aftermarket cat AFAIK (not that any tiny aftermarket cat is likely to be able to pass the ASM loaded dyno emissions test used in the enhanced smog check regions).

The simplest path is to get the check engine light out, but EGR is used for NOx control and the FD makes lots of NOx so there is some risk that you might fail for NOx depending on the age of your cat.

I think the safest option is to locate a federal spec 1995MY ECM, this MY had no EGR as standard for federal cars and the calibration was designed for it. Obviously Mazda did some calibration change to lower NOx and get the car certified with no EGR for 49-state certification. This setup will pass CA enhanced smog check, it is what I have on my 1995 at smog check time (along with a low mileage catalyst) and it passes (with middle of the range NOx numbers, and about zero CO and HC). I also have a second super low mileage main cat sitting on a shelf for when the time comes. Maybe that is overkill.

 

As arghx somewhat mentioned the only difference between a 49 state and 50 state legal EGR is the microswitch that tells the ECU that the EGR has been actuated and those switches rarely go bad (at least from my experience). You can usually cobble one together that does everything you need and is completely legal by combining a 49 body with a 50 tophat. It's been a while since I've dealt with smogging a 93 though.

 

the proper procedure is to call the B.A.R. and if its NLA they will give you an exemption. they may also sell you a "rebuilt" one for an exorbitant price from a really shady guy, and you have to buy it.

plan 3 would be to reset the ECU and hope that the CEL stays off for the test.

plan 4 would be to put the non CA EGR valve and ECU in, no more code 16 no more problem!

 

Our '94 car has been passing CA emissions for years, specifically for the last 10 years without an EGR valve (it's blocked off). But in order to fake the PCME's EGR monitor into reporting normal operation, I added the circuit below next to the PCME in the cabin. It was done in 2008 and has never given any trouble.

 

^
Now that is clever!

 

I have a '94 with CEL for EGR in CA. Replaced with this: EGR4071 https://www.autozone.com/emission-co...lve/229493_0_0
$$$

 

Holy crap, that's actually an FD EGR valve! It's $300ish, but that's one way to do it for sure.

Dale

 

From Jim Ellis Mazda Parts website as of 3/28/18

 

You can still put your money in and order it. Itll never showup to your door tho

 

Sorry to hear that. Since it is not listed as NLA I'm hoping that it maybe like the Mazda Competition suspension bushings I ordered two years ago. They were still in the catalog, but there was no stock anywhere, including Japan. It took almost a year and a half to get the final bushing delivered. I suspect that more and more Mazda will only be dealing in bespoke RX-7 parts.

 

 

So i replaced my ecu with a non fed 94 ecu n3c1 didnt help at all lol code still present 16#
Maybe try a non fed 93 ? Or just clean it up by removing it uhhh thought i could fix it by replacing the ecu

 

All 94 ECU's have the code for the EGR switch. There is no cali/federal 94 ECU. You would need a 93 federal ECU or maybe a 95 ECU (95's have no EGR).

Dale

 

Rotary engines do not need EGR to pass CA emissions. EGR is for reducing peak engine temps which reduces NOx emissions. Peak temperatures in the 13B engine never get high enough to cause problems; also there is already an "EGR" effect from the exhaust back pressure. Our '94 has passed since 2008 when I removed the EGR system (and replaced the EGR monitor circuit as shown in post #11 above. Emission test results from 2010 to 2016 are attached below. (This is with the original engine; I have no results on the new engine yet.)

 

The EGR isn't necessary to pass the actual tailpipe portion, as has been already stated. Mazda cost saved it in 95 model year likely for that reason. So to make the EGR switch light go away you need the correct ECU.

 

Or add a circuit similar to the one I described in post #11 to the existing OEM ECU ("PCME.")

 

 

Pull the CEL bulb out...take your emissions test...pass the test...put the bulb back in.