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SportTrac Discussion
Engine & Drivetrain
Engine rattle under load or from stop light
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<blockquote data-quote="Mark Price 2" data-source="post: 1006812" data-attributes="member: 70403"><p>link didn't work for me...I like Vic's advice...I have had "labor knocking" "pinging" a few times this summer. Mostly happens to me going up steep hills while cruising around 50mph. (engine under load) The first time I upgraded gas on the next fill up and issue gone. The second time it happened I add Chevron Techron fuel additive and it improved greatly. But not completely gone. Added a little higher octane fuel and issue gone. I always fill up at the same Exxon station. I think sometimes I just get a "bad batch". Also happened once after cleaning and re-oiling my drop in K&N air filter. I cleaned the MAF and disconnected the battery for 20min so the PCM could "re-learn. Issue fixed. </p><p></p><p>I would definitely try a tank full of premium and a fuel additive.</p><p></p><p> Also, disconnect the battery and try a relearn. Especially since you had fuel pump and filter just replaced.</p><p></p><p>It doesn't happen unless the engine is under a load. That's why it's not happening in neutral.</p><p></p><p>Cross your fingers and hope it's not the timing chain guides. I haven't heard an actual engine with bad timing chain issues. But, I would assume it would be happening all the time. Not just under load. Please correct me if I'm wrong on that.</p><p></p><p>Edit: link worked. Just had to open in new window</p></blockquote><p></p>
[QUOTE="Mark Price 2, post: 1006812, member: 70403"] link didn't work for me...I like Vic's advice...I have had "labor knocking" "pinging" a few times this summer. Mostly happens to me going up steep hills while cruising around 50mph. (engine under load) The first time I upgraded gas on the next fill up and issue gone. The second time it happened I add Chevron Techron fuel additive and it improved greatly. But not completely gone. Added a little higher octane fuel and issue gone. I always fill up at the same Exxon station. I think sometimes I just get a "bad batch". Also happened once after cleaning and re-oiling my drop in K&N air filter. I cleaned the MAF and disconnected the battery for 20min so the PCM could "re-learn. Issue fixed. I would definitely try a tank full of premium and a fuel additive. Also, disconnect the battery and try a relearn. Especially since you had fuel pump and filter just replaced. It doesn't happen unless the engine is under a load. That's why it's not happening in neutral. Cross your fingers and hope it's not the timing chain guides. I haven't heard an actual engine with bad timing chain issues. But, I would assume it would be happening all the time. Not just under load. Please correct me if I'm wrong on that. Edit: link worked. Just had to open in new window [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Engine rattle under load or from stop light
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