E55 Map reading peaking at 21 psi.
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Newbie
Joined: May 2025
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2005 E55
E55 Map reading peaking at 21 psi.
Recently I tried to monitor my Boost as I thought I was getting belt slip, on full throttle pulls the MAP sensor would peak at 21 psi, which I believe is only 6 psi of boost. Still on stock pulleys so I decided to order a belt wrap kit and a new belt and when I did another pull it still only peaked at 21 psi. At first I thought it could be a boost leak but I don’t think it would perfectly peak at 21 every time. Could this be a faulty sensor or something really wrong.
Thread Starter
Newbie
Joined: May 2025
Posts: 3
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2005 E55
MBWorld Fanatic!
Joined: Jul 2014
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2005 e55 AMG
OK your wording was a little confusing.
Why don't you get a boost gauge to see for sure what your boost is and then go from there. Also stock boost is around 10-11lb's if I remember correctly.
Why don't you get a boost gauge to see for sure what your boost is and then go from there. Also stock boost is around 10-11lb's if I remember correctly.
