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ls1 cutting out on top end?

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Old Nov 23, 2014 | 09:48 AM
  #1  
Lovemy77camaro's Avatar
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From: Pulaski, VA
Default ls1 cutting out on top end?

I have a 2000 trans am with 194k miles and it has always ran good until the past year. My car pulls very strong until I get to about 4k rpms then it stops pulling and kind of spits and sputters. It doesnt fall on its face or anything just stops pulling hard. It use to always pull hard through all the gears all the way to redline. I tried putting wires on it and it seemed to help some but didnt last long. Then I was driving it the other day and it started missing terrible and through cel. checked it and was number 8 misfire, so i was going to swap coil pack and noticed wire was not on coil pack anymore. The wire has white inside the boot, so i put the wire back on and its still doing the same thing. Also the car will back fire BAD when you're getting out of the throttle at high rpms. any ideas?
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Old Nov 23, 2014 | 10:45 AM
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Change plugs and swap coil packs to the other side. See if the misfire swaps banks. If it does then it's the coil or the harness on the coils.
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Old Nov 23, 2014 | 11:27 AM
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well when I put the wires in the cel went off. the plugs only have a couple hundred miles on them.
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Old Nov 24, 2014 | 02:39 AM
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Check your airbox and make sure it's secured. Mines did the same thing cause my coupler was barely off the lid
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Old Nov 24, 2014 | 07:18 AM
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Could be a problem with the maf. At 4000 rpms the maf takes over. If your tune is good un plug maf and see if problem still happens.
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Old Nov 26, 2014 | 12:59 PM
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Lightbulb Maybe...

try the correct forum???
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Old Nov 26, 2014 | 02:33 PM
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Originally Posted by gagliano7
Could be a problem with the maf. At 4000 rpms the maf takes over. If your tune is good un plug maf and see if problem still happens.
My thoughts as well.
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