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P0272 - Leaking Valve???

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Old Nov 2, 2010 | 11:18 AM
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SD350HD's Avatar
SD350HD
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Unhappy P0272 - Leaking Valve???
Could a leaking valve be the reason for a P0272 - Cylinder # 4 Contribution error or should I be looking elsewhere - FICM/Sensors/Wiring?

Just replaced head bolts with ARP studs and heads were checked out - new injectors and oil cooler.

Very frustrating after all that work!!!
 
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Old Nov 2, 2010 | 01:38 PM
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moebdick
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Check the injector connector and harness to be sure it's good.
 
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Old Nov 2, 2010 | 06:53 PM
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compression test time. low compression could be a valve issue bent push tube, damaged rocker, etc. more likly an injector
 
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Old Nov 3, 2010 | 01:23 PM
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Replaced injector with one of the old ones and had the same issue. Checking the wiring harness and will do a compression test.
 
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