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Ba BOOM... My intake manifold blew up!!
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KuruptimpalA
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PostPosted: Sat Nov 10, 2012 9:57 pm    Post subject:  Ba BOOM... My intake manifold blew up!! Reply with quote

so my cars been sitting for a couple of days so i needed a quick jump cuz the battery was drained. when i went to start it up BA BOOM my intake manifold exploded flames and all. I did some research and saw that it might be because of a backfire in the intake manifold instead of out of the exhaust. I was scared s**t. Ran and grabbed the hose, the fire would not go out. i was just waiting for my car to explode. Eventually the flames were smothered enough and went out looks like the supercharger is going on quicker than i thought. heres the aftermath.......just my luck




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00impala123
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PostPosted: Sat Nov 10, 2012 10:04 pm    Post subject:   Reply with quote

So you're gonna supercharge a motor that was in a fire? Sounds legit Laughing

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topgun
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PostPosted: Sat Nov 10, 2012 10:48 pm    Post subject:  boom Reply with quote

holy s**t. Cool

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bigdog60
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PostPosted: Sat Nov 10, 2012 11:12 pm    Post subject:   Reply with quote

Holy Crap batman never seen that before!!

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98ss
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PostPosted: Sun Nov 11, 2012 2:03 am    Post subject:   Reply with quote

Yeah, never seen that one..only when I watch drag racing. You might want to pull all that crap out of there, take out fuel pump relay and see what if anything is not right when you are cranking. Meaning, why the pre ignition, weak/broken spring ect if that is even the case.
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grimsin
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PostPosted: Sun Nov 11, 2012 6:28 am    Post subject:   Reply with quote

Shocked

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Frank
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PostPosted: Sun Nov 11, 2012 11:55 am    Post subject:   Reply with quote

Wow. I haven't seen it happen, but I remember reading somewhere that GM strengthened their intake manifolds at some point.

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EMMJAY
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PostPosted: Sun Nov 11, 2012 1:48 pm    Post subject:   Reply with quote

Shocked jeeeezshhhh Shocked

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EMMJAY, your car is coming together nicely as well!

Frank4202 wrote:
EMMJAY, you and I have always had the same taste in cars Hang Head 2
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Lingenfelter
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PostPosted: Sun Nov 11, 2012 6:08 pm    Post subject:   Reply with quote

Heard of it before, think I've only actually seen pics once.

As long as your ignition is turned to off, the fuel pump should not continue priming or feeding the line, but gasoline is not a fire you fight with water.

Since you'll have to remove the lower manifold to clean all the water and bits out of your valley and replace your fuel line and upper manifold, might as well proceed to step 2 and get your supercharger plans going. Looks like you've gotten more peices to replace beyond those, as well.

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KuruptimpalA
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PostPosted: Sun Nov 11, 2012 8:59 pm    Post subject:   Reply with quote

Yeah that's what i was thinking and the water was all i had lol. i actually just found a new mechanic that is a gm engineer during the day and fixes cars on his off time. He seems like a pretty knowledgeable guy and knows his 3800s, so i think i might be in luck so i can get this done in a timely fashion (and right lol) keeping my fingers crossed but yeah the only thing that melted was the injector and the fuel line so its not like the engine bay was engulfed in flames just out the intake all wires are fine as you can see in the pictures

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guinnessfan
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PostPosted: Sun Nov 11, 2012 10:48 pm    Post subject:   Reply with quote

Yep. We are not supposed to jump the damn Impalas for some reason. You just found out what happens. 3rd time I've ever heard of that happening.
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nightryder
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PostPosted: Mon Nov 12, 2012 9:24 am    Post subject:   Reply with quote

guinnessfan wrote:
Yep. We are not supposed to jump the damn Impalas for some reason. You just found out what happens. 3rd time I've ever heard of that happening.


It has nothing to do with jump starting it, you shouldn't jump start an Impala because you can fry the BCM.

I love carnage Cool

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KuruptimpalA
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PostPosted: Mon Nov 12, 2012 1:19 pm    Post subject:   Reply with quote

Thanks i knew it had nothing to do with that. here's a video i found on the internet of another impala. that's prob what mine would have looked like if the engine was hot. thank god it wasnt. http://carscoop.blogspot.com/2.....a.html?m=1

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greenmachine
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PostPosted: Fri Oct 10, 2014 6:51 pm    Post subject:   Reply with quote

had the same thing happen on my car, Only i didn't jump it. just tried to start it one morning and boom! and little smoke from under the hood. Never did really figure out the cause. One place suggested the fuel pressure regulator, tho I had replaced that a few years before. I replaced the Intake and fuel rail because it got bent. It did not catch fire. After that most times when I try to start it, it really cranks for a bit, instead of popping right off. Any idea why? Seems if its warm it will start right up.

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The_maniac
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PostPosted: Wed Oct 15, 2014 10:59 pm    Post subject:   Reply with quote

GM had a run of fuel pressure regulators that would prematurely fail. They let fuel vapors travel through the vac lines and eventually make it to the intake. When you go to start the car, it ignites the vapors and this is what happens.

If you are doing a top swap it will require a new fuel rail, make sure not to re-use the FPR off you old rail.
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