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Replaced head gaskets and now what

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Old Oct 21, 2012 | 03:16 PM
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Default Replaced head gaskets and now what

I replaced the head gaskets on my 98' sable v6 and now I've got a code p0172 bank 1 and my car runs rough can anyone please give me some pointers
 
Old Oct 21, 2012 | 10:32 PM
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Anyone have any ideas?
 
Old Oct 22, 2012 | 03:47 AM
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The code says that bank 1, the one against the firewall, is running rich.
If you didn't change any other parts and overused silicone sealer , the o2 sensor may be picking up something.
 
Old Oct 22, 2012 | 04:59 PM
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Well I believe it's running rich becuase it's running lean the computer is trying to compensate the fuel. The head against the fire wall has a new gasket, where do you think too much silicone is or what could my problem be?
 
Old Oct 22, 2012 | 05:45 PM
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If the O2 sensor gets contaminated with silicone from a non compatible sealant it get screwed up and doesn't function correctly.
I believe the computer tried to correct the rich problem and couldn't therefore you got a too rich code.
Did you recheck all your work and make sure all the plug wires are in the right place on the coils and plugs for that bank?
Do you have access to a scan tool or are you with just a code reader? A scan tool will provide you with fuel trim info and that will confirm what's going on.
 

Last edited by hanky; Oct 22, 2012 at 05:48 PM.
Old Oct 22, 2012 | 10:54 PM
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I used a code reader tool could you tell me what a good brand of scan tool to buy? I checked all the wires and the coil pack. I checked the compression and it's pretty much zero on a couple cylinders. What do you think my problem is? I'm guessing it might be my rocker arms or push rods but I haven't pulled my valve covers yet I'm planning on doing that tomorrow
 
Old Oct 22, 2012 | 10:55 PM
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One more thing, do you think the code is accurate showing system rich if you have dead cylinders? Just for future reference.
 
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