How to seafoam your 4.2l Gmt-360s - Page 3 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > The 02-09 "How-To" and DIY Section

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  #21  
Old 01-02-2010, 12:30 AM
danolimitpro danolimitpro is offline
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Well after driving around for a while after doing this i got a hell of alot of power back. It got to the point where i couldnt do a brake torque and now im back to that with no problem
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  #22  
Old 01-03-2010, 08:34 PM
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bstromback2002 bstromback2002 is offline
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Originally Posted by billdaman View Post
agreed. guys I see no way that stuff can be good for the cat
Your probably right to some degree on a vehicle like his dakota where the converter is old and already partially plugged it'll finish it off. You wouldn't think it would plug a healthy converter though unless too much was done and it overheated it and melted it down or there was alot of carbon that went through and it couldn't burn out or pass through fast enough thus plugging it up. If that makes any sense.
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  #23  
Old 01-03-2010, 08:39 PM
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MichEnvoyBoy MichEnvoyBoy is offline
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Originally Posted by bstromback2002 View Post
Your probably right to some degree on a vehicle like his dakota where the converter is old and already partially plugged it'll finish it off. You wouldn't think it would plug a healthy converter though unless too much was done and it overheated it and melted it down or there was alot of carbon that went through and it couldn't burn out or pass through fast enough thus plugging it up. If that makes any sense.
Huh? Why would you think my Dakotas converter was old? The truck was 2 years old.

I was 17 and it was 1997 when this happened (Im 29 now) and my Dakota was a 1995. It was 2 years old and had about 30,000 miles on it when I seafoamed it and clogged the cat. My Dad was none too happy as he had just bought it for me for my 17th bday and I had already $^*@ed it up.

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  #24  
Old 01-03-2010, 08:48 PM
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bstromback2002 bstromback2002 is offline
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Just assumed it was an older dakota. if it was only 2 years old and 30k on it who cares it should have been under warranty. But still seems odd.
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  #25  
Old 01-03-2010, 09:53 PM
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Just assumed it was an older dakota. if it was only 2 years old and 30k on it who cares it should have been under warranty. But still seems odd.
It was under warranty. I'd be careful putting seafoam through any vehicle.

Common knowledge that any kind of blowby through the cat con can overheat and clog. Im sure 9 out of 10 times it might not happen but know the chance exists!
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  #26  
Old 01-13-2010, 09:34 PM
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Seafoam thread with pics of my experience...

https://forums.trailvoy.com/showpost....4&postcount=22
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  #27  
Old 01-17-2010, 01:07 PM
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ReconDrill ReconDrill is offline
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I tried Seafoam this morning. Everything went as suspected until after re connecting the vaccum line and turning off the ignition...the motor would not turn off right away. Just spit and spuddered.

Then after waiting 10 minutes, the battery was drained. After a quick jump and a few tries, the motor re-started and blew smoke as expected.

I did throw the trouble code (which after running the motor for a while, I erased with my Actron scanner).

Any idea why the battery would drain?
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  #28  
Old 01-17-2010, 02:31 PM
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Quote:
Originally Posted by ReconDrill View Post
I tried Seafoam this morning. Everything went as suspected until after re connecting the vaccum line and turning off the ignition...the motor would not turn off right away. Just spit and spuddered.

Then after waiting 10 minutes, the battery was drained. After a quick jump and a few tries, the motor re-started and blew smoke as expected.

I did throw the trouble code (which after running the motor for a while, I erased with my Actron scanner).

Any idea why the battery would drain?
Hum not sure man but you should have held your finger over the line before replacing it or at least turned it off yourself. It could be that your battery was bad in the first place. Take it to have it load tested.
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  #29  
Old 01-17-2010, 10:17 PM
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ReconDrill ReconDrill is offline
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Battery is fine...after the motor shut off, I heard what sounds simular to when you initally turn the key to the run position before you actually start it...maybe the erratic RMPs wreaked havoc with the alternator/voltage regulator...just a guess.

thanks for the input.
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  #30  
Old 02-19-2010, 09:13 PM
dudestan dudestan is offline
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Question

I pulled the brake line booster off, and my Envoy engine revved up faster before I put the Seafoam through. It sounds like its not getting enough air intake, cause without the brake line booster it sounds normal. Is it normal to idle slower with the brake line booster on than without?
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