Quote:
Originally Posted by Sondrusen
One fuel is also bad, probably. I bought a new battery earlier today, tried to start it, but no. What I did notice though, was that the fuel pump was making a constant weak hissing sound, for several minutes. Forgot to mention it  Forgot to mention it It's pretty straightforward to swap it for a single 044 Bosch pump? It got duals now. |
Fuel pump whirring, or slight grinding or sizzling sound is normal. Dual pumps are required because of the fuel pressure required to operate the injectors, which are mechanical and driven entirely by fuel pressure. I doubt a single pump will get PSI high enough.
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1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition
Last edited by tinypanzer; 03-07-2017 at 06:50 PM.
Reason: more stuff to add
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