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Old August 24th, 2008, 10:03 PM   #1
country_boy2007
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Default 4.3 vortec help!!!!!

i have a 94 s10 blazer with the 4.3 vortec and it knocks like a son of a bitch and it should because it only has a little over 20,000 miles on it (an accurate engine rebuild) i have had someone look at it and said that the lower end is junk. i have no idea how this could have happened, it has been babyed since the owner put the motor in and since i bought it. im not sure what to do, either pull it and rebuild or put another motor in it........ i need some help if i could get some help i would thank anyone.
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Old August 25th, 2008, 06:46 AM   #2
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If its a 94, its not a vortec. Did you check and make sure that all cylinders are firing? I had a 92 Bonneville that had a bad coil and it knocked like a SOB. Once I fixed it, it ran and idled fine. Also, if it only has 20,000 on the rebuild, it should have some kind of guarantee, unless someone just did it in their garage....
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Old August 25th, 2008, 07:23 AM   #3
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Alot guys think vortecs weren't out till 96' , cause thats when the V-8 one's came out.
But the 4.3 was called that in 92 or 93 with a multi-port injection. And they had a TBI one also. Most likely you have the one that say vortec in big orange letters on top of if.

Look into a short block (new) or you can go on www.car-parts.com and get an idea of what the salvage yards are getting for them complete.
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Old August 25th, 2008, 07:29 AM   #4
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i know of a good running 4.3 Vortec (TBI) for $600.00
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Old August 25th, 2008, 04:42 PM   #5
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i've got a fresh rebuild 4.3 3 month warranty for $900.
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