DME / Engine Management

Step-by-step procedure for opening the DME control unit (and KLR on turbos), identifying and replacing the performance chip, and reassembling, including critical notes on chip orientation and ESD precautions.

Procedure for removing and installing the DME control unit (and KLR anti-knock unit on turbo models) from early under-dash and late passenger footwell locations.

A structured test-point diagnosis of the 8-valve DME (Digital Motor Electronics) fuel-injection and ignition system: equipment, safety rules, and fifteen sequenced test points covering no-start, hard-start, misfire, and poor-running faults — each with the factory pass/fail values.

Reference note on the 944 DME wiring layout — no wiring diagram is reproduced here. The sheets Clark's used were actually 911 DME diagrams only said to be similar, not confirmed 944 diagrams, so verify against factory documentation.

Reference page for the 944 Turbo DME (Bosch Motronic) wiring layout, with pointers to the control-unit removal, chip-installation, and parts-catalogue resources.