Vaughan,

You say CIS basic and K-Jet. CIS basic as I understand it, is really mechanical injection, no lambda box, no WOT switch, no freq. valve. Still uses a warm-up regulator, etc.

The K-jet my old Rabbit GTI had was what was referred to as CIS-lambda (O2 sensor). Had all those things above that the CIS basic did not.

Based on what you described, I'm inclined to agree w/ Dick and Greg, I'd start by looking at what's going on w/ the freq. valve. Either it's bad, or you may have a short in the wiring for the WOT switch that's got it running in open-loop mode all the time (instead of just at WOT). Something else you may want to look into, if that's not the problem, is the cold start injector and the thermo time switch circuit (part of the warm-up regulator). My guess would be the freq. valve or the WOT wiring (check that first).