2004 S4 Misfire and Low Compression

Old Jun 30, 2014 | 05:20 PM
  #1  
audiLarsK's Avatar
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1st Gear
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Posts: 5
Default 2004 S4 Misfire and Low Compression

The compression is as follows:

1) 60 psi
2) 90 psi
3) 100 psi
4) 75 psi
5) 20 psi
6) 0 psi
7) 30 psi
8) 60 psi

After putting a few squirts of oil into the cylinders to check for ring leaks, the compression was:

1) 122 psi
2) 105 psi
3) 100 psi
4) 120 psi
5) 30 psi
6) 0 psi
7) 95 psi
8) 118 psi

I also am throwing codes P0300, P0346, P0305, P0306

Almost no power
I replaced the coils and plugs all the way around

Also, idle is rough and there is a loud whacking sound when it is first started, subsides after a few times, and goes away on subsequent starts.

Any ideas other than faulty rings?

Thanks in advance!
 
Old Jun 30, 2014 | 05:46 PM
  #2  
audiLarsK's Avatar
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Default

Also replaced both cam position sensors
 
Old Jul 1, 2014 | 07:06 AM
  #3  
bradtyler02's Avatar
4th Gear
Joined: Aug 2009
Posts: 5,312
From: Fort Irwin, CA
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It's very possible the cylinder walls are scored pretty bad, which means you either need a new engine, or a complete bottom end rebuild from JHMotorsports ($10K+)
 
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