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04 Northstar Cylinder numbering

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Old Mar 5, 2014 | 08:07 PM
  #1  
Whazzzup85's Avatar
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Default Cylinder #7 Misfire at above 4000 RPM and above 80% throttle

I have an 04 Pontiac Bonneville GXP with the Northstar engine. I have a misfire and I know that it's an ignition coil. I got the code and it's cylinder #7.

The problem is which one is cylinder #7? Is it on the furthest to the drivers side of the car along the firewall, or is the the furthest to the drivers side of the car closer to the radiator. I've searched the internet for hours and can't seem to find the answer.

Thanks
 

Last edited by Whazzzup85; Mar 9, 2014 at 11:02 AM. Reason: Problem changed, changed to title to reflect this.
Old Mar 6, 2014 | 08:18 AM
  #2  
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rear head driver side. front head is the even numbers 2-4-6-8 rear head is 1-3-5-7. on almost all engines #1 is on the front or balancer end.
 
Old Mar 9, 2014 | 10:58 AM
  #3  
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Thanks for that. I replaced the coil. Now it only misfires above 4000 RPM and at I would say above 80% throttle (both of those have to happen in order for it to misfire). If I back off the throttle just a tiny bit, it stops, If I give back just that little bit, it does it again. Engine light flashed but turns off and has a pending code of P0307 - Cylinder 7 misfire. Below the 2 conditions I mentioned, it runs fine.
 
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