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Old May 29, 2026 | 07:04 PM
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I'm leaning towards it being a stretched timing chain.

How often has it gotten oil changes all its life?
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Old May 29, 2026 | 09:29 PM
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Oil changed 5k since new mobil 1
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Old May 29, 2026 | 11:18 PM
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Shouldn't be worn out that soon, unless it is all city driving.

I think next step is to see what the computer thinks the commanded advance and actual advance are when it is too far out of spec.
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Old Yesterday | 07:48 AM
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The comanded is 7 degrees and actual is 0 I think i am gonna try a cam sensor but wont be able to work on it for a couple days The truck runs ok
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Old Yesterday | 10:51 AM
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Yeah that sounds like a cam sensor to me.
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