Quote:
Originally Posted by StaggerLee
Then I measured it between the IP and the transmission: It's a steady 13 and drops to 3-5 upon initial throttle, however, it climbs right back up to where it was at 13. If I let off the throttle and hit it again, the same thing happens. Is that normal?
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Sounds like the vacuum control valve is failing.
Here is one I found on Ebay.
Mercedes VACUUM CONTROL VALVE 300d 300sd WVO diesel | eBay
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