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Old 07-01-2010, 07:49 AM   #1
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Wet MAF

Our 1998 Tropi-cal on the Chev P30chasis shows a check engine engine light when we drive in a heavy rain. The problem has been found to be a wet MAF. The problem clears after driving dry for a while. Anyone else found this problem and come up with a way to keep water out of the intake air? I also posted this under the general topic thread.

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Old 07-01-2010, 09:21 AM   #2
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Quote:
Originally Posted by irwin View Post
Our 1998 Tropi-cal on the Chev P30 chassis shows a check engine engine light when we drive in a heavy rain. The problem has been found to be a wet MAF. The problem clears after driving dry for a while. Anyone else found this problem and come up with a way to keep water out of the intake air? I also posted this under the general topic thread.
Irwin, This is not too unusual. When this happened to me, I would remove the air filter and allow it to air dry in front of a fan. I would do this rather that allowing the filter to dry while driving. Next day put the filter back and the CES light would go out right away. Today I have an S&B air filter box and it hasn't been so much of a problem.
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Old 07-02-2010, 03:12 PM   #3
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Thanks for info. This usually happens when we a long way from destination and cannot stop to allow the air filter to dry. Can you supply more info on the S&B airbox? Thanks again
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Old 07-02-2010, 04:13 PM   #4
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This is what DriVer is referring to. Some have built their own and some bought their kit from Brazels and installed them.
Rain threads go back to 04 when I was having problems with my Newmar coach and placed a bulb rubber strip in hood vent opening to stop most of the water from wiper's from going into the Workhorse TUBA.
If you have a Ford chassis same thing can happen most extented a alumium dryer hose above water entrance connected to bottom of filter housing.





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Old 07-03-2010, 06:03 AM   #5
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I just put the bulb seal around the hood opening and it solved the problem. I got the material from a place that sells truck bed covers.
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Old 07-05-2010, 09:20 AM   #6
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Thanks for info. I guess I would not have thought of the space around the acess door as being the source of the water with the wide open grill just below. I'll give it a try.
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