I have a 2007 S550. no start. No fuel pressure. No codes. No power to the fuel pump. If I supply power to the fuel pump with a power probe, the fuel pump will run. The engine will run. If If I remove the alternated power supply while the engine is spinning, it will run. The rear sam supplies power to the pump. What should I check next? I have rpm signal in the pcm. Pcam is commanding power to the pump request. I am an ASE certified Auto tech. What should I check next? SAM module? Thanks.
Such a beautiful car. I wish they could have kept up the "over-engineering", although I guess it would have been a much smaller, if ever so respected brand. People want quality, unless they have to pay for it.
Way to go Kent
I have a 2007 S550. no start. No fuel pressure. No codes. No power to the fuel pump. If I supply power to the fuel pump with a power probe, the fuel pump will run. The engine will run. If If I remove the alternated power supply while the engine is spinning, it will run. The rear sam supplies power to the pump. What should I check next? I have rpm signal in the pcm. Pcam is commanding power to the pump request. I am an ASE certified Auto tech. What should I check next? SAM module? Thanks.
Such a beautiful car. I wish they could have kept up the "over-engineering", although I guess it would have been a much smaller, if ever so respected brand. People want quality, unless they have to pay for it.