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  #1  
Old 11-08-2006, 05:19 PM
man1nvan's Avatar
Frustrated Astronaut
 
Join Date: Feb 2005
Location: Cornwall UK
Posts: 22
Question Auto transmission weirdness

Does anyone have any idea what causes this. my auto transmission changes perfectly up through the gears, but when i lift off the throttle, it is as if the car is in neutral, the revs drop and in effect the car is coasting, this is like when you dont have enough fluid, but i have checked that, and it isn't flaring between gears, this is a new game for my transmission to play with me! it is an 82 240d auto

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  #2  
Old 11-08-2006, 07:57 PM
patbob's Avatar
Its a Whatsit
 
Join Date: Oct 2006
Location: Portland, OR
Posts: 839
An EGR system leak?

I think that car has an EGR system simiar to my '83 300D. It is designed to disable the EGR at idle and full throttle and does so via the vacuum valves connected to the throttle linkage. If I understand how the transmission modulator vacuum works, if that system were to leak all vacuum when the throttle is set at idle, then you might see a problem similar to what you describe if you are moving at the time. You might check is that is what is happening using a vacuum gauge.
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  #3  
Old 11-09-2006, 04:18 AM
man1nvan's Avatar
Frustrated Astronaut
 
Join Date: Feb 2005
Location: Cornwall UK
Posts: 22
ta

mine is a euro so doesn't have egr, but i think it may be time to buy a vacuum guage! thanks

__________________
-------------------------------------------------------
88 709d moved on
82 406 moved on
82 240d moved on
81 230e deceased
79 240d deceased
73 230.4 moved on
96 210 300 td moved on
92 201 moved on
82 280e daily driver
79 300d keeper
81 240d deceased
87 hymer 660s (408) keeper
......................... You can NEVER have too many cars
Reply With Quote
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