bulletproof makes good points. A 49 state model shouldn't have Lambda Sond--not sure about CA Models. I'd add -- a thorough warm-up is essential because it takes the CPR a while to get to the "running" level. A meter for measuring exhaust without the Lambda system would be the only accurate way but adjusting and road testing can work too - but if there's any discrepancy from ideal doing it this way will usually lean towards the rich side. Adjust from rich to lean -- when it gets to the point of experiencing lean symptoms back it off a little towards rich. If it seems to take a lot of adjusting -- you may have to start from scratch by measuring line and running fuel pressure since those are the key factors in the K-jet system. -- Dave