Sort of, The EHA valve is indeed a variable valve which sets the control pressure. The UTCIS has a pressure sensor to measure the control pressure, making the control pressure a regulated loop. This is a first for CIS and it adds a lot of responsiveness, precision and control to CIS.

The EHA valve uses a current from the ECU to control flow in the EHA. The current vs. flow of the EHA changes over time. The EHA can be adjusted but it will fail eventually. The UTCIS uses a stepper motor driven needle valve which does not shift over time.

We've had a lot of requests for a similar upgrade to CIS-KE. We're reviewing this closely and we welcome your input.

Adding an input for an O2 sensor is a good idea and we're working on it. An O2 sensor is a very good performance tuning and diagnostic tool.

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Steve S
Support Tech
UnwiredTools, LLC
www.unwiredtools.com

1982 380SLC
1994 E320TE
1998 E300DT