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Downtown 300 / Need help with Fuel Pump
« on: December 18, 2016, 11:12:02 PM »
Hello all! I'm having a horrendous time troubleshooting a fuel pump problem on a 2011 DT300i, perhaps someone can help.
When I turn the key, instead of hearing the happy whine/whirring of the fuel pump, I hear a buzzing or series of clicks from the fuel pump relay for 5-10 seconds (priming). It continues this noise when trying to start the engine.
- CELP is showing Error codes 41 and 31
- Battery is 3 months new and is at 12.6v
- Starter motor sounds strong
- Replaced the fuel pump, old one tested at 2.5 ohms (bad), New one tests at 1.7 (good) - Normal is 1.9+/-0.3
- Switched out relay with others - All make the buzzing or clicking
- Relays test good when 12v applied, clicks once and I get continuity
- When I disconnect the fuel pump the relay opens and closes normally
- Fuel pump makes no noise, pumps no gas
I'm really at my wit's end here. If anyone has any ideas of what to test or troubleshoot - I'll be happy to do so and report my findings - The scoot has her clothes off already, in the garage, from the previous work.
Many thanks in advance.
When I turn the key, instead of hearing the happy whine/whirring of the fuel pump, I hear a buzzing or series of clicks from the fuel pump relay for 5-10 seconds (priming). It continues this noise when trying to start the engine.
- CELP is showing Error codes 41 and 31
- Battery is 3 months new and is at 12.6v
- Starter motor sounds strong
- Replaced the fuel pump, old one tested at 2.5 ohms (bad), New one tests at 1.7 (good) - Normal is 1.9+/-0.3
- Switched out relay with others - All make the buzzing or clicking
- Relays test good when 12v applied, clicks once and I get continuity
- When I disconnect the fuel pump the relay opens and closes normally
- Fuel pump makes no noise, pumps no gas
I'm really at my wit's end here. If anyone has any ideas of what to test or troubleshoot - I'll be happy to do so and report my findings - The scoot has her clothes off already, in the garage, from the previous work.
Many thanks in advance.