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e170drvr e170drvr is offline
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Join Date: Sep 2006
Location: Evansville IN
Posts: 261
Wierd test numbers

I finally got my cis tester today and did a couple of tests. of course they came out nowhere near what the manual calls for.

Got a control pressure cold figure of 3.5 bar at 24C. the book calls for between 2.3 and 2.7 at 24c without "charging pressure" and lower with charging pressure. The manual doesn't define "charging pressure" so I guess it means TB pressure to the wur? Anyway it took around 2 minutes to slowly creep up to 3.5 with the pumps running. Any guesses? Bad wur?

The other test was system pressure which came out to 6.6 bar, and the book calls for 6.7 to 7.4 "test value" and 6.9 to 7.1 adjusting value. This was on a cold motor for both tests. Haven't done the rest of the tests yet since I had the huge deviation with the cold control pressure. the manual suggests the wur needs to be replaced. Any thoughts guys?


87 930/68 motor
Old 09-26-2007, 09:46 PM
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