Below is a helpful guide to determine if you have a faulty ECU.
Fill out the Repair and Return Form and send us your unit today.
How to Diagnose your ECU
- Check Engine Light stays on after resetting
- Car was jump started on reverse polarity
- Engine turning off for no reason
- Water Damage or Fire Damage on the ECU
- Apparent loss of spark
- Apparent loss of injection pulse or fuel pump
- Intermittent starting problems
- Overheating ECU
- ECU has Broken Pins
- Loss of communication between the ECU and the Scanner
- A control module memory checksum error
These are some examples of the damages that we see on most ECUs:
Many other symptoms may occur that can drastically lead to an ECU failure such as:
- Erratic idle
- Poor running condition
- Excessive fuel usage
We recommend testing or replacing the following:
- Ignition coils or ignition module
- DME Relay or the Main Relay - Tutorial*
- Faulty spark plugs
- Fuel injectors
- Idle control valves
- TDC and RPM reference sensors - Video*
- Air flow or mass flow meter
- Throttle position sensor
- Power supply
- Grounds - We recommend this Multimeter*
If you believe you have a faulty ECU, we can save you the time and money by testing your ECU DME for $149 before spending on costly diagnostic labor and sensors.
Fill out the Repair & Return Form and send us your unit today!