NO BOOST!!??!
Thread Starter
Senior Member
Joined: Jun 2006
Posts: 379
Likes: 7
From: Los Angeles
W205 C43 AMG
NO BOOST!!??!
I was trying to get a MAP 3 run on my stock with JB4 car on DRAGY. But the last two times i hit it from the light, i am only getting boost in first gear and then almost zero boost till I stop the run at like 70mph. Anyone have any clue why this might be happening? Also I am running about e30 or a little less in the tank right now. Thanks for any help.
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I was trying to get a MAP 3 run on my stock with JB4 car on DRAGY. But the last two times i hit it from the light, i am only getting boost in first gear and then almost zero boost till I stop the run at like 70mph. Anyone have any clue why this might be happening? Also I am running about e30 or a little less in the tank right now. Thanks for any help.
MBWorld God!
Joined: Dec 2019
Posts: 32,222
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Thread Starter
Senior Member
Joined: Jun 2006
Posts: 379
Likes: 7
From: Los Angeles
W205 C43 AMG
I havent checked the valve yet. I havent pulled off that hose because I am not hearing the noises or anything strange at all. I also just went down to MAP 1 and it seems to be building up boost just fine. Im going to try another full throttle run again asap but its hard here in LA. Did you have to change that valve yet? It might be time, i just hit 56K miles.
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MBWorld God!
Joined: Dec 2019
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I havent checked the valve yet. I havent pulled off that hose because I am not hearing the noises or anything strange at all. I also just went down to MAP 1 and it seems to be building up boost just fine. Im going to try another full throttle run again asap but its hard here in LA. Did you have to change that valve yet? It might be time, i just hit 56K miles.
MBWorld God!
Joined: Dec 2019
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Likes: 6,281
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
If you really want to buy the entire part, you could do so here: https://klifex.com/klapan-vakuumnogo...365-2762300265
MBWorld God!
Joined: Dec 2019
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Junior Member
Joined: Oct 2021
Posts: 27
Likes: 4
From: Sydney
MY19 C43
I would recommend testing it before replacing.
Take the hose off the valve and see if any oil blows out. If you see visible puffing, it’s likely oil and means the valve is not doing its job.
If you’ve already ordered the part, test it after install and a few strong pulls because a lot of Chinese valves function initially and come apart instantly soon after.
Take the hose off the valve and see if any oil blows out. If you see visible puffing, it’s likely oil and means the valve is not doing its job.
If you’ve already ordered the part, test it after install and a few strong pulls because a lot of Chinese valves function initially and come apart instantly soon after.
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
I would recommend testing it before replacing.
Take the hose off the valve and see if any oil blows out. If you see visible puffing, it’s likely oil and means the valve is not doing its job.
If you’ve already ordered the part, test it after install and a few strong pulls because a lot of Chinese valves function initially and come apart instantly soon after.
Take the hose off the valve and see if any oil blows out. If you see visible puffing, it’s likely oil and means the valve is not doing its job.
If you’ve already ordered the part, test it after install and a few strong pulls because a lot of Chinese valves function initially and come apart instantly soon after.
Thread Starter
Senior Member
Joined: Jun 2006
Posts: 379
Likes: 7
From: Los Angeles
W205 C43 AMG
I would recommend testing it before replacing.
Take the hose off the valve and see if any oil blows out. If you see visible puffing, it’s likely oil and means the valve is not doing its job.
If you’ve already ordered the part, test it after install and a few strong pulls because a lot of Chinese valves function initially and come apart instantly soon after.
Take the hose off the valve and see if any oil blows out. If you see visible puffing, it’s likely oil and means the valve is not doing its job.
If you’ve already ordered the part, test it after install and a few strong pulls because a lot of Chinese valves function initially and come apart instantly soon after.
Junior Member
Joined: Oct 2021
Posts: 27
Likes: 4
From: Sydney
MY19 C43
Unfortunately, I don’t. I bought roughly half a dozen Chinese valves for cheap because some people mentioned that roughly one in ten work. I found they all came apart easily and just ended up doing some redneck engineering to make it work.
