W168 P0170

[area51]

As per the title, has anyone ever found a cure for this code?

Fuel pressure 3.6 bar. New O2 sensor, fuel filter, plugs etc.

ECU has just come back from rebuild attempt number 4. Car now struggles to start from cold, engine fires up then dies. Repeat this for up to ten minutes before it will run but with very unstable idle. Car is dangerous to drive, will only pull away from rest if I floor it.

I like the car, I've owned it for 19 years. Don't want to scrap it, but....

 

[mattkh]

Please put up a picture of the fuel pump relay showing the state of the flat pins.

 

[area51]

The fuel pump relay is new. The original was 24 years old. No sign of burning or damage on any of the terminals.

 

[mattkh]

The fuel pump relay is new. The original was 24 years old. No sign of burning or damage on any of the terminals.

Thanks.
If the mileage is around 90000, I would suspect the fuel pump which is in the fuel tank.
Also, remove the air fiilter, and through the plastic mesh to the right, spray MAF sensor cleaner onto the element of the MAF sensor.