Quote:
Originally Posted by bobinyelm
The fuel accumulator holds the fuel pressure after the pumps are shut off, right?
If the current fuel pressure holds at 38psi for the next start, is the accumulator supposed to hold MORE pressure than that?
Should it be holding the full 78psi?
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Yes, the FA should hold full system pressure after shutdown. There may be a very slight leak down rate from the FA or pressure regulator, but that should take hours if not days.
When the ignition key is turned to the on position, the fuel pumps are energized for one second, so when I take my 190E 2.6 out of six months storage every year I cycle the ignition on three or four times before cranking to build fuel pressure, and then it usually starts right up as if it only sat overnight.
When you run the FA leak test on the car if you see ANY fuel in the clear vinyl tubing the FA diaphragm is cracked, leaking, and must be replaced in order to get back to normal hot and cold starting behavior.
Duke