Passing Emissions
#1
Hi, I just recently aquired an 85 RX-7 GS. I knew it didn't pass smog when I got it, but I was confident I could get it to pass. Before I got it, it got:
15 MPH: HC(PPM)|"372" Requirement: 148
25 MPH: HC(PPM)|"314" Requirement: 123
What is suprising is the NO(PPM)
15 MPH: NO|"19"
25 MPH: NO|"19"
Average for cars that pass was 350-400
So the fuel is like coming out the back.
I changed the oil, plugs and oil filter, used high octane gas and octane booster. Tested it, and it dropped the HC's by a bit.
15 MPH: HC(PPM)|"226" Requirement: 148
25 MPH: HC(PPM)|"204" Requirement: 123
the NO's are about the same... and i made the CO% of the test pass with this so far.
I do not know what it can be at this point, a new cat... air pump... dist. cap/rotor or what not. I just love this car and would like some help, I really do not want to get rid of because of emissions.
Thanks,
Mike
15 MPH: HC(PPM)|"372" Requirement: 148
25 MPH: HC(PPM)|"314" Requirement: 123
What is suprising is the NO(PPM)
15 MPH: NO|"19"
25 MPH: NO|"19"
Average for cars that pass was 350-400
So the fuel is like coming out the back.
I changed the oil, plugs and oil filter, used high octane gas and octane booster. Tested it, and it dropped the HC's by a bit.
15 MPH: HC(PPM)|"226" Requirement: 148
25 MPH: HC(PPM)|"204" Requirement: 123
the NO's are about the same... and i made the CO% of the test pass with this so far.
I do not know what it can be at this point, a new cat... air pump... dist. cap/rotor or what not. I just love this car and would like some help, I really do not want to get rid of because of emissions.
Thanks,
Mike
#2
I really cant help you but from experiance I have noticed that not too many of the guys on here pass emissions. Most of them get friends who have shops to do it or they buy illegal stickers. Other then that I would suggest a new cat.
#4
Well what i am thinking is imcomplete combustion.... since the hightemp NO's are not where they should be as well. The max for that is 1191 and mine are at 19.... so maybe the coils, rotor, and dist. cap?
#5
how is the air control valve? there are 4 parts to the emissions system, the air pump, acv, main cat and the tps. the acv is easy to check, there is a hose that goes into the right rear of the air cleaner, take it off and put your finger over it. if air comes out while the engine is under 2500rpms you need to make the air control valve work
mike
mike
#8
let us know if you pass I have to pass IL emissions once I finish my car and register it, no emissions stuff on it.. I'm curious if that can of stuff works. I've heard a can or two of heet in a low tank of gas will help pass also.
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