Help in IL

[JCSTTA]

I failed emissions for the first time today. Here are the readings

HC
passing
.80
reading
1.46

CO
passing
15.
reading
11.1

C02
NA
reading
505.9

N0x
NA
reading
2.60

stats are MSD 50's, FP 42 line off, and a testa 93 chip other than a catback it is otherwise stock
The car has 144k and runs well. It passed emissions for St Louis a few months ago. The only thing that has been changed is the enjectors and chip.

Where should I start to make this thing pass? Does anyone make a emissions chip for 50's?

 

[gofstbuick]

Try dropping the FP a little and see what happens. If the HC rises and CO falls then you may be too lean. But realistically, both readings should fall.

 

[rob nolan]

Originally posted by JCSTTA
I failed emissions for the first time today. Here are the readings

HC
passing
.80
reading
1.46

CO
passing
15.
reading
11.1

C02
NA
reading
505.9

N0x
NA
reading
2.60

stats are MSD 50's, FP 42 line off, and a testa 93 chip other than a catback it is otherwise stock
The car has 144k and runs well. It passed emissions for St Louis a few months ago. The only thing that has been changed is the enjectors and chip.

Where should I start to make this thing pass? Does anyone make a emissions chip for 50's?

Sent you a email.