Date registered: May 2007
Vehicle: 2003 Mercedes Benz E500
Location: San Francisco Bay Area
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Quoted: 1 Post(s)
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also want to check out the accelerator pump injection nozzle in the throttle bore. These can plug up over time and produce a small "piddle" of fuel and not the steady stream required for enrichment on heavy acceleration. There is actually a tool for measuring the accelerator pump output at the nozzle, but I suspect one would be difficult to come by these days.
The part [nozzle] in question is #190 in the breakdown drawing above. Be careful changing this piece, if necessary, as dropping it down the bore will necessitate a rather time consuming process to remove it...