Confirming VCV condition
03-31-2019, 03:57 PM
#1
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1983 240d
Confirming VCV condition
I completely forgot I even posted this:
https://mbworld.org/forums/e-class-w...ml#post7571446, however I have progressed through the following having the Mercedes in Storage. vwnate1 if you're seeing this, the Valve Adjustment is going to be next, after I get my family moved to a new home where I can dive into this car. However, this is what I'm encountering thus far, and some illustrations as well.
After some time to troubleshoot the problem, I have come up with the following discovery...I'm still lost, but hopefully you all can help. I picked up a Vacuum Hand tester, and Vacuum pressure test Hg. I've gone through the following steps: Also look here for images: https://imgur.com/a/Tk1G2XX.
- As you can see the Vacuum tester, was used on the Vacuum modulator, which shows good 20-21 Hg
- I picked up a Vacuum tester from Habor Freight and went to work on the VCV and other Vacuum lines
- Based on the images, I'm seeing an issue with Vacuum off of Port 5 on the Central Plug, even with Bypassing the VCV, I'm only getting about 5-9Hg of vacuum
- If I were to plug directly into 4 for example, remove the Central Plug, and place may hand over the back side of the plug I would get 20-21Hg.
- I'm hitting a wall as to which piece is the problem, whomever had the car before hand removed a good amount of Linkages from the level with Cam (68 on the image on Imgur)
- I'm moving soon, so I cannot remove all vacuum hoses to properly diagnose, but once I move out I'll have time to look into things.
The symptoms I'm seeing are, and which I can notice change:
- If I were to move the Lever with Cam, to simulate my flooring the Accelerator, the car accelerates faster off the line, and begins in 1st gear
- Regardless if I have it floored or not, I typically always go through each gear by 25MPH.
And I'm pretty sure, the transmission shifts form 2 to 3 at the same time, or a second after. I wouldn't call it a flare, but it shifts way too soon. Resulting in if I'm at 55MPH the engine is screaming.
https://mbworld.org/forums/e-class-w...ml#post7571446, however I have progressed through the following having the Mercedes in Storage. vwnate1 if you're seeing this, the Valve Adjustment is going to be next, after I get my family moved to a new home where I can dive into this car. However, this is what I'm encountering thus far, and some illustrations as well.
After some time to troubleshoot the problem, I have come up with the following discovery...I'm still lost, but hopefully you all can help. I picked up a Vacuum Hand tester, and Vacuum pressure test Hg. I've gone through the following steps: Also look here for images: https://imgur.com/a/Tk1G2XX.
- As you can see the Vacuum tester, was used on the Vacuum modulator, which shows good 20-21 Hg
- I picked up a Vacuum tester from Habor Freight and went to work on the VCV and other Vacuum lines
- Based on the images, I'm seeing an issue with Vacuum off of Port 5 on the Central Plug, even with Bypassing the VCV, I'm only getting about 5-9Hg of vacuum
- If I were to plug directly into 4 for example, remove the Central Plug, and place may hand over the back side of the plug I would get 20-21Hg.
- I'm hitting a wall as to which piece is the problem, whomever had the car before hand removed a good amount of Linkages from the level with Cam (68 on the image on Imgur)
- I'm moving soon, so I cannot remove all vacuum hoses to properly diagnose, but once I move out I'll have time to look into things.
The symptoms I'm seeing are, and which I can notice change:
- If I were to move the Lever with Cam, to simulate my flooring the Accelerator, the car accelerates faster off the line, and begins in 1st gear
- Regardless if I have it floored or not, I typically always go through each gear by 25MPH.
And I'm pretty sure, the transmission shifts form 2 to 3 at the same time, or a second after. I wouldn't call it a flare, but it shifts way too soon. Resulting in if I'm at 55MPH the engine is screaming.
04-15-2019, 10:48 AM
#2
Junior Member
4.15.19
The too soon up shifts is called 'stacking' .
I wish I could help ~ the vacuum signal to the modulator on the tranny is supposed to drop as you depress the throttle .
The too soon up shifts is called 'stacking' .
I wish I could help ~ the vacuum signal to the modulator on the tranny is supposed to drop as you depress the throttle .
