There was a time that vehicles didn’t come with sophisticated computer systems. Those cars and trucks used pneumatic and mechanical systems to regulate idle speed, valve timing and fuel delivery. Today, vehicles are equipped with multiple actuators and sensors that are connected to computers, ensuring everything runs the way it should. Some of these computers include the PCM, ECM, ECU and TCM.
- Check Engine Light comes right back on, after reset
- Vehicle has been jump-started on reverse polarity
- Engine all the sudden turns off without any reason
- Engine Computer water or burn damage
- Spark loss
- Injection pulse or fuel pump loss of power
- Intermittent starting
- Engine Computer overheating issues
- Broken Pins on the Engine Computer
- No communication between the Engine Computer and the Scanner
- CMOS Checksum error (Ford ECMs mostly)
- Erratic engine idle
- Dirty or malfunctioning Mass Air Flow (MAF) sensor
- Stalling (the car just shuts off)
- Bad running condition
- Bad fuel economy
- Ignition Module & Coils
- Ignition Control Module & Coils
- DME Relay or Main Relay
- Spark Plugs
- Fuel Injectors
- Idle Control Valves
- TDC and RPM Reference Sensors
- Air Flow or Mass Flow Meter
- Throttle Position Sensor
- Power Supply (Ford ECMs mostly)
- Grounds
- Check Engine Light DTC
