Here are the first 5 sites that I found that say CIS stands for Continuous Injection System. I found none that said anything about idle speed. The K-Jetronics is a fuel injection system, oftne associated with "CIS". Since the fuel injection system has absolutely NOTHING to do with idle speed, which is an air-valve, it seems very unlikely to me that "CIS" has anything to do with idle speed. Also, is there a bold alternate fuel injection system called "RFIS"- with "Randomly Fluctuating Idle Speed"? Bill, you should recheck your acronyms, i think you have made a mistake. Even if your book does say exactly what you're saying, it is possible that it is wrong as well. www.aircooledtech.com/CIS_injection/ "The acronym CIS stands for "Continuous Injection System". " www.peugeotclub.org/peugeot/archive/General/2000/Oct/0055.html "CIS stands for Continous Injection system and K-Jetronic is Bosch's name for such system" www.audifans.com/archives/1999/04/msg00305.html "the CI in CIS stands for continuous injection" www.c2turbo.com/ forums/showthread.php?goto=newpost&threadid=511 "CIS stands for Continuous Injection System" www.fortunecity.com/silverstone/subaru/1/CIS/ "CIS stands for Continuous Injection System" Jim 1537 On Thu, 22 Jan 2004 05:16:14 -0000 "content22207" <brobertson@xxxx> writes: > Your misidentification is actually quite common: > > CI -- "Continuous Injection" > CIS -- "Constant Idle Speed" > > These are Bosch's terms, adopted by Peugot, Renault, and Volvo. > ________________________________________________________________ The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today!