LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> BMW >> 1983 >> 633CSi Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH AFC >> Testing >> Cold Start Injector
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Cold Start Injector

  1. Disconnect electrical connector from cold start valve. Connect voltmeter leads between harness terminals and crank engine. Voltage readings should be battery voltage when engine is cold and zero volts when engine is warm. If not, check thermo time switch and electrical circuit.
  2. Turn engine off and remove voltmeter. Measure resistance of cold start injector. Resistance should be about 4-5 ohms. If not, replace cold start injector.