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Procharged Escalade + Car Wash = Check engine and rough idle! Why????

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Old Nov 24, 2011 | 08:37 PM
  #21  
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Originally Posted by Blowndenalixl
... but after washing the Escalade with a sprayer tonight to get the road salt and grime off, ...
Road salt? Already? That is depressing.
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Old Nov 24, 2011 | 10:54 PM
  #22  
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Originally Posted by MikeGyver
Road salt? Already? That is depressing.
Oh yes, this is the great white north. Telling tale here, which I will illustrate in Fahrenheit and inches, not our forced down our throats celsius and centimeters....

We had a real cold snap last week. Temp dropped to about -25, perhaps closer to -35 at night. On Thursday, it snowed around 6 inches (sounds worse when you call it 15 centimeters though I must add). Stayed cold all weekend. On Tuesday, it warmed up to about 40 degrees. People were walking around with jackets undone, or no jackets at all.

So sick when you get climatized so quickly to the bitter cold, that a small excurion above freezing becomes suntan weather.

Stay warm my friends from the south! And remember, Canada is a nice place to visit...... in the summer!
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Old Nov 24, 2011 | 11:36 PM
  #23  
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I really doubt it is a wet air filter, my filter gets wet all the time when I take it through a high pressure wash from the cowl hood or spray the engine down. The only time its acted similar to what you are discribing was from bad 02 sensors, another time was the knock sensors were bad then I replaced and sealed them up real good, and another time was a loose ground on the back side of the engine.
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Old Nov 25, 2011 | 12:22 AM
  #24  
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you might also look into a filter sleeve from k and n. that will keep the water off of the filter. and a new set 02 sensors wouldnt hurt either.

like this

Last edited by 2lo2k; Nov 25, 2011 at 12:37 AM.
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Old Nov 25, 2011 | 08:09 AM
  #25  
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Originally Posted by marlboroman71818
I really doubt it is a wet air filter, my filter gets wet all the time when I take it through a high pressure wash from the cowl hood or spray the engine down. The only time its acted similar to what you are discribing was from bad 02 sensors, another time was the knock sensors were bad then I replaced and sealed them up real good, and another time was a loose ground on the back side of the engine.
Some more information from the drive to work yesterday - the air/fuel ratio when I stepped on it was around 11 or 12 then read rfc? or something like that. I recall from the old thread some advice about backing off the throttle when getting readings like that so as to not grenade the engine. It should not be the fuel pump as I had that replaced just a couple of months ago.

And again, with heat and time, the problem fixed itself. So something is getting impacted by water, I would tend to think. The only spots where the water would have gotten in are around the cowl, or through the front grill, or up the exhaust (highly unlikely - I was not standing there shooting water up the tailpipe..but I was trying to clean up the exhaust tip).

At least next time I will know to run a diagnostic by onstar and ASK for the codes, since they don't keep them, and won't e-mail them to you (I was told). They can either tell them to you (and you write them down) at the time you run the test or they will send them to a dealer. Makes me very motivated to keep paying for onstar.
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Old Nov 25, 2011 | 07:40 PM
  #26  
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Found some 4 year old e-mails from Allen today, where he was giving me information about one of the gauges he had installed on the Escalade. This gauge measures a ton of stuff, including IAT, intake air temp, HP, mileage, throttle percentage, on and on.

At any rate, turns out if I pressed both buttons on the gauge simultaneously, it displays a further menu, and one of the items was the DTC!

So I choose that, and remembering that I have never used this feature before, so the codes may be from previous incidents, but the codes were:

PO300
PO201

not sure if the 2nd digit/number? in each code is a O or a 0 (old man = poor eyesight0), but do these codes have a particular meaning?

Edit - found this - seems to fit the bill: http://www.obd-codes.com/p0300

http://www.obd-codes.com/p0102


I am going to clear the codes next time out, in case this happens again, I will know for sure the codes are related to the incident.
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Old Nov 25, 2011 | 09:50 PM
  #27  
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An Aeroforce gauge? Ya, there they are handy.
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Old Nov 25, 2011 | 10:35 PM
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Now you're on the right track! Carwash tomorrow?
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Old Nov 25, 2011 | 10:37 PM
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Originally Posted by 1SlowHoe
An Aeroforce gauge? Ya, there they are handy.
I love mine!
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Old Nov 25, 2011 | 11:24 PM
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so basically sounds like you need and tune up and to clean the mass air sensor?
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