Need Tech Day / Car Tuning Help
 

It is the end of August, and my tabs will expire tomorrow, I have taken my car through emissions twice, and failed both times.

1985 Mazda Rx7 GS
1.1L Carberated Rotary
Stock Exhaust
215420 Miles

The first time i took my car to emissions I passed everything but the IDLE Hydrocarbon. (Too Much Fuel)

The second time, i failed all my tests and the results are:
HC (PPM), CO (%), CO+CO2 (%), 02 (%)
Cruise Limit: 180, 1.3, 6, N/A
Cruise Emisssions: 283, 2.34, 15.04, 1.33
Idle Limit: 220, 1.2, 6, N/A
Idle Emissions: 414, 1.33, 10.83, 6.69

Odd thing while I was testing at cruise of 25mph, in second gear, my tach was reading 3500rpm, but their machine reported 1110rpm

And at idle, they couldn't get a proper reading it bounced from 950, to 1500+, my tach was reading 900-1000rpm

I know that my two pre-cats, are burnt away, and I have 50% left of my monolithic.

I have replaced my spark plugs, my secondary's had bad deposits on them, I have MSD Blaster Ignition Coils, and I am running a stock exhaust, that i am pretty sure is partially clogged, and causing excess restriction in my exhaust.

It sounds like my car is having misfiring, because i hear put put put from my exhaust, and it just might be because of the restriction in my exhaust. I adjusted the timing, and tried adjusting the fuel/air mixture screw, but I can't seem to find a good balance between lean, and rich.

I have enlarged the hole for the air supply that feeds the catylitic converter.

I am reaching out for help, any advice would be greatly appreciated, I would also like to possibly meet up with some experianced rotory heads, to get my car emissions worthy. As compensation for anyone who can help me with this in person, i'll treat you to some beer, and a BBQ.


Thanks you for your help, and your time,
Signed,
Anthony S. Cox

P.S. I live in Northgate, Seattle.