Quote:
Originally Posted by rcarr72
i have a 1985 280 SE. I am having problems with the fuel system. it is acting like it is starving for gas. Question: What is my required fuel pressure needed to run the engine? I am looking at replaceing the fuel pump again. i changed it out when i first was given the car like 2 years ago. Also, I see fuel pumps for cheaper online. How is the quality with these pumps? Will they give me the pressure i am needing? Any other itmes on the car that may cause this type of symptom? Thinking about changing out the filter while I am at it. Also I should note that I emptied the tank, puled it out, ran some acetone through it, blasted it out at the car wash, dried it out real good and put it back together, then replaceedthe filter about 6 months ago.
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By all means replace the fuel filter. From your narrative, the filter is an unknown quantity.
With respect to "starving for gas", could you expand a bit? What are the observed symptoms, and when do they occur? Is there a starting problem, and does it occur with a cold start, or a hot start? Is there a lack of power when large throttle openings are employed? Stumbling & misfiring at small throttle openings, or at large openings?
System fuel pressure w/engine idling: 5.0-5.6 bar.