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Old Aug 13, 2006 | 02:36 AM
  #21  
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Originally Posted by Zitty'sZ
Maybe a few of your lifters are starting to fail and as your rpms increase the lifters just bleed off and the valves are not opening fully or staying open the degrees they should, causing the misfires.I know it's alot of work, but if you've tried everything else and nothing has changed, buy a new set of lifters and see what happens. Good luck!

I said at the top that I just put in new Comp lifters when i did the head swap and it didnt change a thing....

Last edited by Dub C; Nov 8, 2006 at 10:26 PM.
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Old Aug 13, 2006 | 02:44 AM
  #22  
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So you have done a compression test and all the cylinders check out?
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Old Aug 13, 2006 | 05:03 PM
  #23  
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Originally Posted by JMBLOWNWS6
So you have done a compression test and all the cylinders check out?
yep. They all had good compression.
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Old Aug 13, 2006 | 06:02 PM
  #24  
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I'd take another dyno run and log the fuel pressure all the way through. If that checks out, do you think it could be related to the valvetrain harmonics?
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Old Aug 13, 2006 | 09:34 PM
  #25  
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Ect sensor and knock sensors. Also check your sensor fuse in the under hood fuse box. I had a bad ect sensor and my car acted all sorts of stupid and I put a new one in (autozone) and it kept doing the same things so I swore it wasn't that but I was at the chevy dealer picking up parts for work and had them throw in a new ect sensor to just try it and it fixed all my problems.
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