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Old 05-03-2002, 01:44 PM
Ron Johnstone Ron Johnstone is offline
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Join Date: Jan 2001
Location: Santa Clara, CA
Posts: 437
If I jump 87 to 30, both pumps do run, but the car won't start. If I also jump 87V momentarily to shove a bit of gas into the engine, it will start.

It seems clear that Steve is right and the pumps are simply not putting out enough pressure to activate the injectors.

Since one pump feeds the other, and they are damn expensive, I would hope that only one has to be replaced. Any educated guesses as to which one to try first? Or, do they kind of wear out together and I should replace both at once.

What kind of life should one expect from these pumps?

Many thanks for the help!
'76 240D-Sold
'78 240D-Sold
'85 300 SD, 165K-Sold
'88 300 TE, 165K-Sold
'64 Porsche 356C Cabriolet
'86 560SL 124K Miles
'94 320E Wagon, 74K Miles-128K Miles JUNKED
'06 E350 Wagon, 84K Miles
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