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#1
01-18-2005, 11:44 PM
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190E Vacuum hose question w/pic
I can't identify where this intake manifold vacuum hose goes. It is black with a white stripe. If it goes to the transmission modulator then how many hoses is the modulater suppose to have attached?
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1999 E300 TD 1999 E300 TD, WVO conversion 2007 Jaguar XJ8 1993 190E 2.3, Limited Edition, 239,000 miles (sold) 1991 300 SL (sold) 1977 MGB 1969 TR6 1980 TR8 joturbe@comcast.net 
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#2
01-19-2005, 08:21 AM
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That is the vacuum source for a thermo-vacuum valve that controls venting of the evaporation system (charcoal cannister).
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
01-19-2005, 08:40 AM
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On my 190 that is for the transmission. There is one on the side as well that goes to the HVAC/Economy gauge.
The ones under the AFM that are attached directly to the throttle body go to the Thermo Valve. Unless there was some big change between 1986 and 1993 MB Doc is off. Also I have the Maint CD and it shows all years and they remained just as I stated.
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~Jamie _________________ 2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's. 1986 190E 2.3 Black, Auto, Mods to come soon.....
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#4
01-19-2005, 09:11 AM
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The 1993 models don't have an ecomomy guage. The transmission is shifting very hard so I was thinking the hose may go to a transmission function. I got underneath and found the modulator on the passenger side, but 2 hoses are already connected there. How many hoses are suppose connect to the transmission modulator?
__________________
1999 E300 TD 1999 E300 TD, WVO conversion 2007 Jaguar XJ8 1993 190E 2.3, Limited Edition, 239,000 miles (sold) 1991 300 SL (sold) 1977 MGB 1969 TR6 1980 TR8 joturbe@comcast.net
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#5
01-19-2005, 11:34 AM
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Even without the economy gauge the one vacuum line still goes to the firewall and into the car for the HVAC system! Just does not split for the economy gauge.
__________________
~Jamie _________________ 2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's. 1986 190E 2.3 Black, Auto, Mods to come soon.....
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#6
01-20-2005, 08:12 AM
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The WHITE/BLACK pictured on the throttle housing goes to the thermo vacuum valve & The Black/WHITE for the modulator comes off of the intake runner for cyl # 3.
ONLY 1 hose goes to the modulator & it should have vacuum with the engine running.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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