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Old 12-22-2003, 06:51 PM
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Join Date: Jul 2001
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Help! Trans shifting hard after fuel filter(s) change!

1995 E300D with 606.910 engine.

I just changed the main fuel filter and the prefilter. I had never changed the prefilter before, only the main. I cranked and cranked and cranked and no start. Come to find out that the new prefilter had no O ring on it, so I used the O ring from the old prefilter and got the car running. (That summarizes 2 hours of hair pulling aggravation and trouble shooting!)

Now the car shifts very hard and not at the proper time, speed wise. I suspect I've done something to the trans - something vacuum related or ? Does anyone have any suggestions for what to check? Something that could be caused by excessive cranking or something I may have dislodged?

I had also removed the intake crossover pipe to examine the injector fuel return lines to look for a fuel leak (none found there, anyway), but I know I replaced the resonance valve vacuum line to its connection.

Any suggestions appreciated.

Rgds,
Chris W.
relative diesel newbie


Last edited by Chris W.; 12-22-2003 at 06:59 PM.
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Old 12-22-2003, 07:22 PM
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Join Date: Jun 2000
Location: Eastern TN
Posts: 20,841
Most likely you knocked off a vacuum line. Trace the vacuum line from the AT modulator and see if it's attached to anything. If it is, follow the lines from that device upstream, etc.

Sixto
95 S420
87 300SDL
83 300SD ... $950, see cars forum

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