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is it dead for good...with video

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Old Sep 10, 2009 | 12:59 PM
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Default is it dead for good...with video

So after fixing the eltrical issue it was time for first start up. Obviously it didnt go to well. The car fires instantly and shuts off nearly as quick it stays running for maybe 1-2 seconds . Whats scaring me is the creaking noise that follows when it turns off as you can hear in the video. The oil pressure gauge goes right up so i dont think thats the issue. If i put my foot on the gas alittle it forces itself to stay running but im afraid to do it because of the noise in the video. Please advise wise people

The Heads / Cam specs are very lightweight , BRAND NEW LS1 Heads, new lifters, new c5 z06 lightweight valvetrain , gm yellow ls6 springs, Ls1 hot cam on 112 lsa

http://www.youtube.com/watch?v=2nHun5KVOBg
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Old Sep 10, 2009 | 02:58 PM
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Ok......

I unplugged the MASS AIRFLOW sensor and boop she fired right up and runs nice nice....for abouttttt 10 seconds then its almost as if someone is slowly depressing the gas peddle as it mimicks acceleration and the idle gradually raises up up the farthest i let ito go was 3 grand .......this is getting ridiculous its like a sick game
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Old Sep 10, 2009 | 03:29 PM
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Sounds like it wants to run to me, what happends if you give it some gas when it starts up?
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Old Sep 10, 2009 | 03:36 PM
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Air, fuel, spark. All there? What else do you know that would help us?
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Old Sep 10, 2009 | 03:37 PM
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I hear the fuel pump whine after it shuts down. Any DTC? Scan it and let us know, ull have the MAF code since u unplugged it. Also is it open exhaust? mighty loud and doesnt help when listing for a certain noise. Ur gettin spark and fuel. Somethin is killin one of em after its running. You sure u plugged up the IAC?
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Old Sep 10, 2009 | 05:07 PM
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Just wondering but after you did the install of all of the new parts did you get it tuned?? When it shuts down it doesnt sound that bad just sounds like the pistions releasing the gasses in the cylinders. If you had it tuned then i would think that who ever did the tune had no idea what they were doing. And i hope you know that after everything you did one of the little hand held tuners is not enough to tune the car you need someone with a laptop and the programing to do it. Just my .02c
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Old Sep 10, 2009 | 06:28 PM
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Did anybody else notice how freakin quick that oil pressure went up, is that normal?
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Old Sep 10, 2009 | 07:25 PM
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Check to make sure the grounds on the back of the head are tight.
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Old Sep 10, 2009 | 07:28 PM
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hm hm hm its fixed

seems as if the egr plug that goes into the intake manifold was "not on tight enough " and had to be plugged better after that was solved i plugged in the MAF and she fires right up and runs great

oh and the oil pressure is fine....new lifters, new oil pump , new oring
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Old Sep 10, 2009 | 07:59 PM
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Glad you got it figured out. Do you have a tune?
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Old Sep 10, 2009 | 08:16 PM
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I still think it is crap that a leak could shut down a damn car like that.
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Old Sep 10, 2009 | 10:14 PM
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Originally Posted by Zaxz28
I still think it is crap that a leak could shut down a damn car like that.
You've clearly never had a vacuum leak...
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Old Sep 11, 2009 | 09:10 AM
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unmetered air will cause it to be very lean. If the O2 picks up theres more O2 in the exhaust then what it meters comin in its gonna shut it down. Cant beleive u didnt hear the leak if it caused this.
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Old Sep 11, 2009 | 10:13 AM
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Originally Posted by BigDB
unmetered air will cause it to be very lean. If the O2 picks up theres more O2 in the exhaust then what it meters comin in its gonna shut it down. Cant beleive u didnt hear the leak if it caused this.
He couldnt b/c of the open exhaust
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Old Sep 11, 2009 | 11:15 PM
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Originally Posted by TooLateVTEC
He couldnt b/c of the open exhaust
correctamundo my man

and yeah a vacuum leak that large = no bueno
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Old Sep 13, 2009 | 05:17 PM
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Ok next problem (gotta love fbodies)

Anyways after driving the car i noticed i lost a **** load of coolant FAST so i took the intake off to find 4 of the same 2 series of open holes on each corner of the head i dont know what they are or wat is supposed to go there , can i just throw a bolt in each hole? cuz when you fill it with coolant it just pours out of em.

i took a picture of em but as i said theres four of them


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Old Sep 13, 2009 | 05:23 PM
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No pics but by chance did you forget the coolant bypass plugs and the tube up front?
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Old Sep 13, 2009 | 05:34 PM
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Originally Posted by Ice78Transam
You've clearly never had a vacuum leak...
Nope but I bet I will after I install my intake. I just have an 81 corvette full of vaccuum hoses and it does not shut down if it leaks. I know it isn't the same thing but damn.
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Old Sep 13, 2009 | 05:39 PM
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found it guys thanks :-) will post video of her running on wednesday :-)
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