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Old 06-13-2005, 08:50 PM   #1
limestoner
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Member#: 35490
Join Date: Apr 2003
Location: OKC, OK
Vehicle:
97 Impreza 2.2l
slow.

Default waterlogged air filter

we had a hard rain here last night and driving home my car started to bog down. i limped the car home(1/8 mile) and went out there this morning to survey the damage.

i have a my97, no snorkus but stock airbox. filter was soaked, had water on MAF, the tube that connects the air box to the plenum on the throttle body, and in the plenum itself. couldn't tell whether there was water in the throttle body or further along the intake tract.

so i disconnected everything up to the throttle body, bought a new air filter, allowed everything to dry out and reassembled it all. should i take any further precautions? any fuel additives or what not?
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Old 06-13-2005, 09:14 PM   #2
limestoner
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Member#: 35490
Join Date: Apr 2003
Location: OKC, OK
Vehicle:
97 Impreza 2.2l
slow.

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oh and i haven't had any CEL's..
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Old 06-13-2005, 09:21 PM   #3
myobsej22
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Join Date: May 2005
Location: columbia, sc
Vehicle:
1997 OBS
red/gun metal two tone

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this happened to me about a month ago, i have an aftermarket ram air intake, but since i do not have a front bumper right now or an inner fender lining where the air filter is, hitting a few puddles on the passengers side causes the same effect.

my97 obs bogged down to the point where i had to flatbed it home. i took off the whole intake piping and dried it out. i sprayed all the water out of the air filter and checked to see if water had gotten into the throttle body, but it didn't seem like it. I even pulled out a spark plug to see if the tip was wet, to see if water had made it inside my engine.

from my understanding, i think the MAF sensor experienced thermal shock from the cold water hitting it. The ECU was getting incorrect readings from the MAF sensor and freaked out.

I think just drying everything out should take care of the problem, it did for me anyway.
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Old 06-13-2005, 09:26 PM   #4
limestoner
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Member#: 35490
Join Date: Apr 2003
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Vehicle:
97 Impreza 2.2l
slow.

Default

ahh.. didn't think to pull plugs and check..i'll go do that now. thanks.
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Old 06-13-2005, 10:19 PM   #5
limestoner
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Join Date: Apr 2003
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97 Impreza 2.2l
slow.

Default

didn't find any evidence of water on the plugs so i think i'll be alright. car is running fine, think most of the problem was the wet air filter.

on a side note, when i first started it up after reassembling everything, it was idling at like 2k. is this because i disconnected some hoses from the intake tract to remove it all?
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Old 06-14-2005, 12:19 AM   #6
myobsej22
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1997 OBS
red/gun metal two tone

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my subaru does that sometimes, like right when i crank it over it shoots up pretty high and stays there for like half a minute or so and then comes back down to regular idle rpm. I don't think that's a problem.

there aren't really any hoses that you could disconnect that would do that. But everytime you take apart your intake make sure you reconnect the large diameter hose on the bottom of the intake, without that your won't idle for very long before it stops running.
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Old 06-14-2005, 12:25 AM   #7
limestoner
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Member#: 35490
Join Date: Apr 2003
Location: OKC, OK
Vehicle:
97 Impreza 2.2l
slow.

Default

yeah i neglected to do that when i first started the car.

anyway, probably gonna change the oil tonight since i'm still a little concerned about whatever miniscule amount of water is in there, if any. it needs to be changed anyway.
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