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Originally Posted by Hit Man X
How is a bad fuel pressure regulator electrical?  Seeing how it is vacuum referenced. |
I was agreeing with the
potential of it being electrical because the fuel computer could be acting up. The regulator certainly isn't electrical. It's also as far as I understand not vacuum referenced like other MBs. On this setup that line is just there to direct fuel into the breather in the event of diaphragm failure.
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Anyway, with a pump that's 20 years old I'd change it to be safe. Check PNs to see if your 420 pump will swap, I don't think as V8s use dual pumps. But remember, the newest 126 is from 1991 and is 18 years old.
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Couldn't agree more. Just went through that with my car, and although the new pump didn't completely cure my issues, it restored quite a bit of power to the motor, and cured other issues.
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My 300sel's pump was VERY loud before it about kicked the bucket. It was in the $100 range when I bought it, cheap all things considered for a Bosch pump. I'd do it and a filter.
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Yeah, I just did both of mine and although I still have issues, they really did need to be replaced. The new pump was quite a bit quieter.
Me too, unfortunately......