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Tap when accelerating.

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Old 04-20-2019, 01:01 AM
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Default Tap when accelerating.

So after my 08' 5.4 is warmed up. It has a tap upon hitting the throttle. Weather it is a fast or slow acceleration. I bench tested all coil packs, and checked the boots to be sure of no cracking. I then proceeded to unplug the vct's. Started the truck and noise is gone. Plug them back in and noise is there. I know it is not a hard job replacing them, just time consuming. Parts are gonna run me $80-$100. I have the powertrain warranty with $100 deductible. Does anyone know if the warranty will cover this? It is worth it if it does just because it is a pia to do.
Old 04-20-2019, 10:04 AM
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i cant answer your question on the warrenty but the VCT selonioid isnt the most difficult thing to do, I did mine 2 weeks ago.
you tube has an excellent vidoeo on it
tactical patience is required as well as T27 bits. watch the videos-

this one was the most instructive to me
Old 04-20-2019, 11:14 AM
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Originally Posted by OEFVETF150lover
i cant answer your question on the warrenty but the VCT selonioid isnt the most difficult thing to do, I did mine 2 weeks ago.
you tube has an excellent vidoeo on it
tactical patience is required as well as T27 bits. watch the videos-

this one was the most instructive to me
https://www.youtube.com/watch?v=SyzR...w&index=8&t=0s
if his motor build date is 10/09/07 or later, this will not help him... gotta pull value cover.

Last edited by techrep; 04-20-2019 at 11:17 AM.
Old 04-20-2019, 11:45 AM
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Yeah, mine is not the easy one to do. Valve covers have to be removed on mine.
Old 04-20-2019, 03:28 PM
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i have an 04 so i speculate there was a subtle change in 06
Old 04-20-2019, 03:38 PM
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The change was after the engine build date i mentioned above.
Old 04-21-2019, 07:50 PM
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Originally Posted by techrep
if his motor build date is 10/09/07 or later, this will not help him... gotta pull value cover.
Mine is for sure the harder one to change. Engine build date is 03/04/08. I knew I could not get lucky on this.
Old 04-21-2019, 11:19 PM
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But in the grand scheme of things new VCTs will be easier than new timing set. Give a good opportunity to check for condition of cams, followers, sludge. Unlike the '04s, I don't think you need to dump the AC, so while pulling the valve covers is a hassle, it's not TOO much of a hassle.

However, if the VCTs are plugged... I'd be expecting to find varnish and sludge elsewhere, and then open up a can of worms.
Old 04-22-2019, 05:16 PM
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Yeah sludge is a whole other thing I did not want to do. Maybe I should just drive it till timing chain, or engine fails altogether. Then have ford rebuild or replace everything.
Old 04-25-2019, 06:57 AM
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Update. I took it to the dealership. They called back and said it was my cam phasers. But ford powertrain warranty will not cover it till it gets a cel. Or gets to the point of not driveable. So I guess I am driving it till cel comes on.



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