running rough after car wash - ideas why? (Full Version)

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running rough after car wash - ideas why?

  

ecpmd19 -> running rough after car wash - ideas why? (3/4/2008 5:21:53 PM)

Okay, I took my 1999 wagon to the car wash to get a weekend's worth of snow, salt dust, and grime off of it.

In the middle of the automatic high pressure wash my motor starts reving to about 2500rpms for a second or two then back to idle for a second or two and then back to 2500 and back to idle and then quits.  Mind you, I am not touching the accelerator..  After a WTF moment I restart without a problem.  The motor will idle fine but when I try to accelerate the motor will run to a little over 2000 rpms and then immediately back to idle like a yo-yo over and over.  I limped back the 6 miles or so home, it took me about 45 minutes..  When I got it into my garage I started and stopped the motor a couple of times and suddenly the issue stopped and the motor reved like expected when depressing the accelerator.  I took it for a quick test drive and all seems fine again. 

Any ideas on what may have happened? or is happening...

My hunch is that water from the car wash plays a big part in this, but I can not be sure. 

Has something like this happened to anyone else?

Thanks for any ideas!!

  
Injunfarian -> RE: running rough after car wash - ideas why? (3/4/2008 6:26:32 PM)

Did you notice white smoke coming out of the exhaust... sounds almost like when I dunked my H1 into water over the air intake and my H1 swollowed some water... It was sputtering and couldnt get any power at all for the longest time. Maybe some of the water/mist in the air got passed your filter or even "clogged" it for a bit making it act like this... I'd suggest pulling your airfilter out of your truck taking it inside for the night letting it dry off then installing it back on once it is dried. DO NOT DRIVE IT WITHOUT THE FILTER

3hummers -> RE: running rough after car wash - ideas why? (3/4/2008 6:35:03 PM)

If the car wash used a high pressure sprayer they could have sprayed some water into/under the air intake cap. You want to be careful with that. Fortunately it sounds like you didn't get too much water down the intake. Hummers inhaling water is like you inhaling water, too much = no breathing anymore. None of the automatic washes around here will take an H1. I go to the self serve to wash off the bad stuff so I don't have to shovel it out of my driveway but I am always careful around the intake.
Sounds like no long term damage. Like Injun said, let the air filter dry out, replace it and sounds like you got some education without having to pay for it.

ecpmd19 -> RE: running rough after car wash - ideas why? (3/4/2008 6:36:04 PM)

I hope a clogged air filter is all it is!
I didn't notice any white smoke, but I wasn't looking for it either.
Thanks for the reply!

3hummers -> RE: running rough after car wash - ideas why? (3/4/2008 6:39:25 PM)

If it is running fine now you are ok. Just make sure you get the air filter dried out or replaced.

ecpmd19 -> RE: running rough after car wash - ideas why? (3/4/2008 6:58:34 PM)

I must say the first thing that passed through my mind when she quit during the wash was hydro-lock.  Last summer I watched two non snorkle H1s inhale water, and stall after creating a monster bow wake on a water crossing.  
There likely was some water that would have made it under the intake cap. 
Maybe I got lucky and my motor is fine..  I sure hope so.  I'll replace the air filter tomorrow.

Thanks!

3hummers -> RE: running rough after car wash - ideas why? (3/4/2008 7:21:36 PM)

Ok. Let us know how it turns out.

ecpmd19 -> RE: running rough after car wash - ideas why? (3/5/2008 3:54:07 PM)

Everything looks fine and is running fine... knock on wood.....I am feeling relieved!

I was planning to replace the air filter (K&N) but after taking a look decided not to.  It looked really clean..

What are your thoughts on K&N air filters?  I have heard good and bad.  More 'debateable' performance at the expense of letting more bad stuff through the filter..??  Just curious, I do not have experience there.

Injunfarian -> RE: running rough after car wash - ideas why? (3/5/2008 4:32:45 PM)

I personally dont have experience with it but while browsing on another forum a guy took samples of his motoroil to a lab, they confirmed high amount of metal shards. He replaced his K&N with the paper based one took another sample after x amount of miles not as much metal... so to make sure he put K&N back in and tested again high amount of metal afer x miles. So he concluded it was the K&N. Although there is alot more elements then just the milage and filter in this kind of test, so dont think its a for sure test but it was enough for me to steer away from K&N.

3hummers -> RE: running rough after car wash - ideas why? (3/5/2008 7:32:24 PM)

I am running OEM filters so no experience with K&N either.

hmcoleap -> RE: running rough after car wash - ideas why? (3/5/2008 7:50:12 PM)

The K&N debate is like a religious argument - there are folks on each side, and they all seem to feel strongly about it. 

My experience with the K&N is not Hummer related, but I have two Land Rover Discovery II's; I currently have a K&N in one (because the previous owner had installed it), and an OEM paper filter in the other.  I see absolutely NO perceivable performance gains from the K&N. 

I personally prefer the OEM filter over the claims of performance gains at the expense of potential excessive long-term wear.  To me it is simple - if you are letting more air through than the OEM filter, you are also letting more of other stuff through, too. 

I have no plans to put a K&N in the Hummer.



ecpmd19 -> RE: running rough after car wash - ideas why? (3/5/2008 8:44:00 PM)

Thanks much for the insight guys!
Before making this post I heard more H1 folks 'against' K&N than 'for'.  For that very 'letting more other stuff through' arguement. You guys have reinforced that position.  I'll believe I'll be changing to an OEM filter sooner rather than later.

3hummers -> RE: running rough after car wash - ideas why? (3/5/2008 9:41:51 PM)

We are here to help and support each other. Contribute what and when you can and come back often.

  

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