Peake Code 7F - DM-TL module - ??? - Page 3 - BMW M5 Forum and M6 Forums
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post #21 of 32 Old 11th June 2011, 09:06 PM
malexgcab
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post #22 of 32 Old 8th February 2015, 10:59 PM Thread Starter
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OK, I've been dragging this code [7F DMTL module] around for years and am finally getting around to changing the "Leak diagnosis pump", P/N: 16137193479 . REALOEM shows this coming off the activated charcoal filter for the fuel tank ventilation system. What's the easiest way to get to it? I don't need to drop the tank, do I??

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post #23 of 32 Old 8th February 2015, 11:03 PM
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It's easy to drop the charcoal canister, just pull the rear left wheel and liner, then lift the canister straight up and pull it forward. The hoses have enough length to come forward a bit. From there, you can undo the clip on the main hose and drop the canister out.

From there, it's easy to swap the module. Shouldn't take more than 45 minutes from wheel off to wheel on.
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post #24 of 32 Old 8th February 2015, 11:17 PM
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Personally if you still are having problems with E8 Evap valve, I would deal with it first. If your Evap valve was sticking open a bit it can cause the 7f. The 7F is any leak anywhere on the vapor side of the tank. That would include the evap system including a leaky valve. That said it is possible that because you failed to replace the evap valve and it was stuck shut that big pressure built in the system and killed the DMTL unit. Either or you would be best to do the evap vavle first and hopefdully you won't have to do the DMTL.
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post #25 of 32 Old 8th February 2015, 11:55 PM
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If you guys aren't concerned with the cause of the code, I can take care of it for you in 5min
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post #26 of 32 Old 9th February 2015, 12:39 AM Thread Starter
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Quote:
Originally Posted by PedM5 View Post
If you guys aren't concerned with the cause of the code, I can take care of it for you in 5min
very likely, this is mostly emissions stuff, i'm not excited about taking the plenum off just to change that little bugger valve either, again, all for emissions stuff. what do you need?

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post #27 of 32 Old 9th February 2015, 01:38 AM
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post #28 of 32 Old 9th February 2015, 02:14 AM
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You can not take care of the E8 code by coding it out the car must have a functioning vent system. The evap valve vents pressure or vacuum from forming in the tank. Tanks have been known to collapse and sometimes pressure in the tank builds high on a hot day which causes the fuel pressure to rise well above what it should be.

As much as the evap valve is emissions because it prevents fuel vapor from escaping into the air . Once the fuel system is designed to have one you must have one, there is no other vent.

Last edited by Sailor24; 9th February 2015 at 02:17 AM.
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post #29 of 32 Old 9th February 2015, 02:45 AM
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It doesn't sound like he has the E8 code though, just D7. I fixed the D7 code on my car in December, and it was just the dmtl pump. It *could* be a leak elsewhere, but why not start with a part that's an easy diy, especially in light of no E8 code?
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post #30 of 32 Old 9th February 2015, 02:49 AM
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