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Old 03-23-2009, 12:18 PM
Ian White's Avatar
machinemanjr
 
Join Date: Jan 2009
Location: Spokane, Washington
Posts: 642
300SD Intake sensor?

What exactly does that sensor do? Does it somehow tie in with the ALDA overboost circuit? The wire coming from the sensor looks like it goes into the loom behind the IP, which looks to be running in with the glowplug harness or am I seeing things? I removed the sensor from the intake while I had it off to clean out the Intake. Lots of guk from 28 yrs of driving and 300,000 miles. If you haven't cleaned yours out, be prepared for a lot of soot and oil mess. The best was to get all of it out of the inside would be an ultrasonic cleaning tank. I don't have one so I used our H.P. solvent tank, even then I still had to use a long tiny wire brush to try and dig all the soot and grime out.

Thanks!
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Ian White

1995 E300 Diesel w124 OM606
2007 GMC Sierra Classic 1500 4x4 5.3L

2001 BMW 740i E38 M62 (past)
1981 300SD w126 OM617 (past)
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  #2  
Old 03-23-2009, 12:21 PM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,174
Ya, that's the overboost protection sensor. When boost gets to around 15 PSI it grounds, closing the overboost protection valve.

-Jason
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1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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