So I've got an FC, which I bought knowing it had failed emissions. Drove it around for a while in Victoria (insured for a couple days since the test doesn't apply there). No problems to speak of; pulls pretty hard, but it was rebuilt and maintained well so that's expected. But since I live in Vancouver, if I get in a crash driving to work or something, I'm f'ed so I need to get this to pass.



The past emissions tests it did were all stellar, then everything tripled. Still, only HC is over by a bit (cat was heated up nice and toasty, emissions junk is all there, it's basically stock). So, I was thinking of getting rid of the precats and replacing them with a pacesetter header, just to simplify things and I'm wondering if this could fix the problem (if they were clogged and could be messing up readings, etc). I'd like to fix this cheaply, and with the exchange rate a bonez cat is going to violently bend my wallet over. I should mention idle is very steady and it doesn't stall so I don't think it's a sensor issue. Still, just for insurance, what should I replace? I've search around nopistons and rx7club looking for some help, but nothing too specific has come up.



Thanks, and any other suggestions would be much appreciated.

If its just a little over the limit, try to get your hands on some e85, and mix it like 3 parts gas 1 part e85 and retake your test. It will drop your HC count a bit, but should still run fine.

Pretty sure the test was done with husky gas in the tank. So it's already got a decent amount of ethanol in it.

check the air control valve, if its not working it wont pass.

https://www.nopistons.com/forums/pub...1047683664.gif I can't believe I haven't checked it out yet. Not once since I bought the car...Hopefully that's it and my problem is a simple case of retardation.

if the valve isnt working right, but its good, the two vacuum lines in the front of the plenum get mixed up, and its also run by the tps

well...the one I just got is letting out unburnt fuel that you can SEE fogging out the tailpipes...but I have no O2 hooked up...so, you might try that. a universal is like 20 bucks at advanced auto...for a cheap fix, it might be worth a try.

i had a simlar problem. i have a 6 ported na with s5 internals, no emissons equipment, no cat, also im running super rich. i failed hc and nox, i added a cat and ran the e85 method and passed with flying colors.

and where are you at?

im north of atlanta, we have strict emissions in my county.