Fuel Injected

The EGR lift sensor detects amount of EGR valve lift and sends this information to ECU. ECU compares lift signal with internal calibration tables and modifies signals to EGR control solenoid to produce the desired vacuum signal to the EGR valve. Manifold vacuum signal to solenoid is regulated at about 8 in. Hg by the Constant Vacuum Control (CVC) valve. If lift sensor signal does not respond to regulated vacuum signal as expected, ECU will set code 12 in memory and turn on the dash mounted PGM-FI warning light. If light is on and code 12 is set in memory, see appropriate article in the COMPUTERIZED ENGINE CONTROLS section.