Pressure wash - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-03-2003, 03:56 AM   #1
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Default Pressure wash

Hey i took a high power pressure washer to my engine to clean it off...well a buddy of mine started it and i saw how much it cleaned it so i said go for it...well my car ran fine on the way home from his house...but when i started my car 30 min later it ran like **** and sounded loud as hell and like ****...anyone know whats up with that?
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Old 07-03-2003, 01:15 PM   #2
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Yeah that wasn't very smart...
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Old 07-03-2003, 05:31 PM   #3
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well i went out and started my car today...idled like ****...sounded like ****...drove it around for about close to 45 min...when it idles it sounds bad but once yoru going til about -2 boost it sounds normal...then once you get over and stuff it gets loud and sounds like a hellicopter...i have no clue what i did...i dont know if water got in hte injectors...i filled it with gas...and put gas treatment in...but other than that i have no clue...i might take the coils off tomorrow if it still runs bad...see whats up with them...any suggestions????????
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Old 07-03-2003, 05:31 PM   #4
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I clean my engine compartment usually once every six months. I use simple green and a garden hose. When you do this, make sure you kink the hose and only spray water where it should be. Avoid electrical wires to the best of your ability and DO NOT get any water near that black box next to the air filter box (that'* your PCM). Make sure you also clean the top of the transaxle bell housing real well so it can cool easier.
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Old 07-03-2003, 05:33 PM   #5
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so are you sayin i F*&^%$$ my pcm...and what is that? cuz we took the washer to everythign in the engine sprayed it everywhere
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Old 07-03-2003, 05:35 PM   #6
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Next time you clean your engine, only use ArmorAll all purpose cleaner. The less water you use the better. Something about spraying an engine with water

I'm goin for a custom engine cleaning next week for $35 bux. The guys that are doing it, don't use water...only rags and products. They did a friends car on Monday like showroom.

Crazy...you more then likely got something really wet and/or it dislodged. Can't say for sure..sorry :(
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Old 07-03-2003, 05:38 PM   #7
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Haha, this is an easy one. Lets just say it'* time to upgrade your coil packs to a nice set of packs from MSD!

I did the exact same thing last fall. I cleaned off my engine and was a little happy with the water. Well, it turned out that my middle coil pack got wet and fried. I had similar problems as what you described. I was getting what seemed to be almost like backfire, a rough idle, stumbling on acceleration, and more. Took it to the shop (thinking I literally blew up the engine internals) and they just replaced a coil pack and everything was back to normal.

I am not sure if the 92'* use the same packs as the 95'* but I do have some spare ones (known good) sitting in my garage right now
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Old 07-03-2003, 05:42 PM   #8
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still safe to drive it or not?
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Old 07-03-2003, 05:47 PM   #9
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Quote:
Originally Posted by CraZyDriVer868
still safe to drive it or not?
Only if you have too. It will keep driving but what is happening is the spark is getting messed up and going off at the wrong time. This is causing it to fire the cylinder at the wrong time. The "explosion" in the cylinder is comming out the exhaust and inlets instead of bieng contained. That isn't good for you engine.
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Old 07-03-2003, 05:48 PM   #10
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ok..thanks...
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