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| Damian15447 |
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hello again i got around to running the engine running test and i got back 2 error codes
172 System always lean HO2S(1) The engine is always running lean (V8) 176 System always lean HO2S(2) The engine is always running lean (V8) Can be caused by a faulty sensor, cold sensor, or exhaust manifold leak could this possibly be a bad maf sensor? im unsure of what to look at first things ive changed myself are the coil, cap/rotor, leads/plugs, o2 sensors with vdo ones. would my extractors be causing these codes? :/ |
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| XR9UTE |
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Could be caused by all of those things and more.
Try a known good MAF on there. Check your HEGO ground and also check your block ground to the battery negative. Could also be your fuel pump and/or filter. For lean running your ACT or ECT would be reading hot. Headers are unlikely to cause this problem except if they are leaky. |
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| Damian15447 |
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ah right i have a set of pacemaker PH4000's tri-y headers i took the fuel filter out and it was pretty dirty so hopefully ive found the cause of the error codes and miss. will let you know how i go. thanks
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| Damian15447 |
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hello i got around to putting in the new fuel filter. it doesnt seem to be missing now but i havent taken it for a decent drive. so i will post back if the missing comes back. thanks for your help guys
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| XR9UTE |
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No worries,
Disconnect your battery for awhile to clear KAM as well Damian. Be surprised if it's just the fuel filter but hopefully it is. |
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| Damian15447 |
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hey just thought id let you know how the fuel filter went. the missfire isnt as bad as it was but its still there.
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| Damian15447 |
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hey guys i regapped my spark plugs from 1.4mm to 1.1mm and the missing has gone. im sure the msd coil would of coped with a 1.4mm gap as it is the standard gap for these engines. thanks for the help
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| Damian15447 |
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hello again. it seems the miss has come back and i dont know what to look at next. any suggestions?
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| Damian15447 |
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found the missing turned out to be my new o2 sensors i installed were busted.
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