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#1
03-17-2009, 10:48 PM
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what does this part do? [vac switch valve m103]
 what does the vacuum switchover valve do in this picture? Its connected to the intake manifold and the EZL gizmo (i think thats what its called)
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k 
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#2
03-17-2009, 11:26 PM
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sorry i looked at the vacuum diagram again...u sure that's connected to the EZL? cause there should just be a line coming from near the throttle plate to the EZL; shouldn't have a switchover valve inbetween
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#3
03-17-2009, 11:32 PM
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Can't tell without tracing the line out, but it could be EGR or similar, purge, etc.... Trace it out....
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-tp 1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS 1988 560SEL "Gunther"- 190K passes anything except a gas station 1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition
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#4
03-18-2009, 12:38 AM
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I stand corrected:
The EZL's vac line goes into the intake manifold closed to itself The Switch's line goes into the port just to the left of the EZL's in the manifold The Switch's other line goes behind the headlamp to what appears to be a dashpod or something. My question is: what does it do? I was attempting to adjust my mixture via duty cycle when I lost all readings after 30 seconds @ idle. I tap the throttle up enough to make that switch click it come back...
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k
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#5
03-18-2009, 12:58 AM
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check you headlamps to see if they aren't vacuum height adjustable.
Take three or four HIGH res photos from directly above the engine. (in quadrants) we will be able to better see what's going on there..
__________________
RIP: 80 300SD RIP: 79 450SEL 2002 E430 4matic (212,000km) 2002 ML500 'sport'  ____________________________ FACEBOOK: PANZER450
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#6
03-18-2009, 01:31 AM
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High Res pictures:
http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_8974.jpg http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_8975.jpg http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_8976.jpg http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_8977.jpg http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_8978.jpg http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_8979.jpg http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_8980.jpg http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_8981.jpg http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_8982.jpg This whole thing tracks back to me adjusting the mixture via duty cycle..I was working on it for a good while (long enough to get to op temp) and i was waiting for the 30 seconds to pass so it could go to ECU/EHA/Lambda control and once it did..the scope flatlined...it would come back if i hit the throttle just enough to open up that vac switch..maybe thats just a coincidence..
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k
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#7
03-18-2009, 01:54 AM
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Good job with the pics, I traced the most visible line that I could see It takes it source from the manifold, and the line that heads towards the headlamp could be a vent line, and the line running from the bottom of that valve would likely be what ever is needing switched vacuum.
__________________
RIP: 80 300SD RIP: 79 450SEL 2002 E430 4matic (212,000km) 2002 ML500 'sport' ____________________________ FACEBOOK: PANZER450
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#8
03-18-2009, 01:57 AM
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hmm,
Do you think is switching to vent excess vacuum? I dont recall ever hearing this thing switch on/off when i had the 2.6L motor in there... (not saying that it was operating as it should have been but just an observation)
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k
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#9
03-18-2009, 02:02 AM
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I doubt that very much. maybe try disconnecting it and see if anything changes? *shrug*
__________________
RIP: 80 300SD RIP: 79 450SEL 2002 E430 4matic (212,000km) 2002 ML500 'sport' ____________________________ FACEBOOK: PANZER450
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