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  #16  
Old 09-06-2018, 12:30 PM
RoberticusMaximus RoberticusMaximus is offline
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Join Date: Jan 2012
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Default Re: Not sure if knock or misfire or both?

Well guys, he texted me a video, which I put on YouTube... is this clear enough to tell anything?


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oh and dadgummit, i forgot to ask him if he tried removing the belt temporarily... had some people mention that to me, just keep forgetting to ask him

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i asked him lol, waiting for a response
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  #17  
Old 09-07-2018, 07:02 AM
tomw0 tomw0 is offline
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Join Date: Aug 2015
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Default Re: Not sure if knock or misfire or both?

Dang, he starts to hone in on the sound, getting closer and closer and then starts to wave the camera/phone around like he's flying a drone.
I would be checking the timing chain area as that seemed to be from where the noise emanates.
It almost sounds like a loose pulley on the crankshaft. It does have a 'rap', but does not have a sound like a rod bearing, to me. Not loud or heavy enough to be a piston whanging up and down on the journal.
Has the engine been maintained well, or neglected like so many others? If you look through the oil filler and peer at the gizzards you can see, do they look like fresh metal or are they dark brownish? If you idle the engine with the oil cap off, does that help hearing the sound more clearly?
If there was a problem with the cam chain, it might be affecting the cam position sensor, at specific rpms having a harmonic, and poking the ignition system causing a misfire. Or not.
tom
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  #18  
Old 09-07-2018, 08:49 AM
RoberticusMaximus RoberticusMaximus is offline
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Default Re: Not sure if knock or misfire or both?

it was bought used, not sure @ what mileage. but since he's had it, it's been well taken care of. i do believe he's been having a shop change the oil for him though...
i'll pass along the oil filter/oil cap inquiries and thoughts on the crank pulley & cam chain!
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2.3, duratec, knock, misfire

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