CEL for Evap under G-force load
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Joined: Sep 2006
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From: North of San Francisco
14 E550, 07 E550, 69 Mach I, 65 Hipo, 66 Fairlane GTA Conv, 66 Fairlane GT
CEL for Evap under G-force load
I have a P2422 (Evap) code that I have been chasing for over a year.
I can clear the code but it comes back after a few hundred miles. Now I'm noticing that it's only every few hundred miles between throwing a code because that's how often I have the opportunity to do a full out 0-70 blast or pitch it into a high speed sweeper. It's the G-forces that are triggering the Evap CEL. I just did it last night on a 120 degree sweeper. Also seems to happen with a partial tank of fuel (could be unrelated).
Prior to coming to this G-force realization I have swapped out:
Question: could an errant fuel tank pressure sensor trigger a CEL under G-forces? And, is it possible it would show as a P2422 code?
I can clear the code but it comes back after a few hundred miles. Now I'm noticing that it's only every few hundred miles between throwing a code because that's how often I have the opportunity to do a full out 0-70 blast or pitch it into a high speed sweeper. It's the G-forces that are triggering the Evap CEL. I just did it last night on a 120 degree sweeper. Also seems to happen with a partial tank of fuel (could be unrelated).
Prior to coming to this G-force realization I have swapped out:
- the fuel shut off valve (Y58/4), which is what the P2422 code point to;
- the charcoal canister;
- the purge control valve (Y58/1); and
- the gas cap.
Question: could an errant fuel tank pressure sensor trigger a CEL under G-forces? And, is it possible it would show as a P2422 code?
Last edited by John H; Apr 19, 2021 at 09:38 AM.
Thread Starter
Member
Joined: Sep 2006
Posts: 228
Likes: 42
From: North of San Francisco
14 E550, 07 E550, 69 Mach I, 65 Hipo, 66 Fairlane GTA Conv, 66 Fairlane GT
Changed the B4/3 sensor. No help.
I can trigger a CEL with a hard right turn almost on command.
Fuel slosh?
Wiring?
I can trigger a CEL with a hard right turn almost on command.
Fuel slosh?
Wiring?
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Joined: Apr 2007
Posts: 633
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From: USA
2006 E320 CDI
I had this same problem on an 88 CS5000 turbo, so this is a long shot, and it took me many months to find it but it was a hidden crack on the bottom side of a 3“ air (remembering that it was accordion) boot and it opened under hard G turns, can‘t remember it if was especially left or right turns, sometimes just under hard accelerations it would throw the CEL too. Replaced the boot it made the car a screamer again, fast fun car!
Thread Starter
Member
Joined: Sep 2006
Posts: 228
Likes: 42
From: North of San Francisco
14 E550, 07 E550, 69 Mach I, 65 Hipo, 66 Fairlane GTA Conv, 66 Fairlane GT
I had this same problem on an 88 CS5000 turbo, so this is a long shot, and it took me many months to find it but it was a hidden crack on the bottom side of a 3“ air (remembering that it was accordion) boot and it opened under hard G turns, can‘t remember it if was especially left or right turns, sometimes just under hard accelerations it would throw the CEL too. Replaced the boot it made the car a screamer again, fast fun car!
I was hoping this was a somewhat common problem that a MB mech may have dealt with in the past. Not excited tracing all the vacuum and electrical lines looking for a fault. I still think it's related to fuel slosh - I did change the pump and filter myself 3+ years ago and maybe one of the 3+/- lines that cross between tank sides came loose. Only about an hour or two to open up the tank.
Thread Starter
Member
Joined: Sep 2006
Posts: 228
Likes: 42
From: North of San Francisco
14 E550, 07 E550, 69 Mach I, 65 Hipo, 66 Fairlane GTA Conv, 66 Fairlane GT
