The actual correct meaning of CIS is Continuous Injection System as opposed to Pulsed Injection. This is a family of systems with K-Jetronic w/ Lambda Control (aka K-Lambda) being the one we are interested in. The main feature is that fuel is always being delivered by the fuel injectors while the pump is running. It is easily identified by the fact that the fuel injectors do not have any electrical connectors on them as they would in a pulsed system. Another way to look at the acronym CIS is on an old Delorean that hasn't run in years is Corroded InSide. The idle system is called Bosch Electronic Idle Speed Control System. There is no acronym. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, Jan van de Wouw <delorean@xxxx> wrote: > On Tue, 20 Jan 2004 17:23:30 -0000, Bill Robertson wrote: > > > CIS (Constant Idle Speed) system has been covered before > > Could be me, but I thought CIS was for > Constant Injection System