High RPM Noise/Power Loss, Phasers?

[Grubb]

06 GT, A few thousand miles ago I started experiancing a ticking from the top end above 5500 rpms. No noise at all during idle or normal driving but every time it hits 5500 and over it has a ticking, almost like its over reving and it losses power. I data logged and sent it to Lito, he said it looked like the timing is going to 0 degrees at high rpm. I'm finally ready to start the repair process, has any one else experienced this issue? Trying to isolate if its a vct or phaser issue or something else. BTW it has 80k miles, auto if it matters, basic bolt ons, newer plugs, always 93 octane and changed the oil Motorcraft. Any help would be much appriciated!

 

[cavero]

subbing...I've got an '06 w/ 85k and I'll be interested to see how this goes

 

[07gts197]

Any cel? It could be pinging and the computer is pulling timing to compensate. I thought that if its the phasers it would tick at idle but I could be wrong since I have no personal experience with them


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[Grubb]

No cel or code history


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[07gts197]

Did u get gas anywhere you normally dont recently? Are u tuned for 93 octane?


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[Grubb]

Tuned for 93 and it's been a issue for at least 2,000 miles so not a gas issue


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[07gts197]

Hmm Id definately be looking at the phasers because all else failed lol. I want to say its adaptive knock but thats a long time for it to be still ticking. What do they think at lito?


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[cdynaco]

Chain tensioners?

 

[Grubb]

What do they think at lito?


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He said the timing appears to go to 0 degrees at the point the noise starts which is ultimately controlled by phasers. Has anyone been successful cleaning out VCT solenoids? I'm curious if they are not operating correctly. Mainly wanting to isolate the issue to the phaser/chain assembly. I plan on replacing the whole kit, chain/tensioner/guides/phasers. My fear is that I go through all that work and still have the same issue.

 

[QuickShift281]

He said the timing appears to go to 0 degrees at the point the noise starts which is ultimately controlled by phasers. Has anyone been successful cleaning out VCT solenoids? I'm curious if they are not operating correctly. Mainly wanting to isolate the issue to the phaser/chain assembly. I plan on replacing the whole kit, chain/tensioner/guides/phasers. My fear is that I go through all that work and still have the same issue.

Replacing everything together wouldn't be a horrible way to do things. I believe Ford Racing makes a entire kit for the 3 valves (from phasers to lower gear). Good luck and hope it solves the issue.

 

[07gts197]

^^ agreed. Plus its not a bad idea to replace the timing chain and all that. Itll need to be swapped out sooner or later.


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[BEAST]

I'm going to go way out of the field here and ask if you've replaced anything on your exhaust lately? some of the hangers in our car if they're installed upside down will make contact with the body causing false knock and making the computer pull timing. Normally in the higher RPMS.

 

[cdynaco]

I'm going to go way out of the field here and ask if you've replaced anything on your exhaust lately? some of the hangers in our car if they're installed upside down will make contact with the body causing false knock and making the computer pull timing. Normally in the higher RPMS.

Now there's a thought outside the box. Although you'd think the knock sensors to ECU would be more isolated than that.

 

[BEAST]

Now there's a thought outside the box. Although you'd think the knock sensors to ECU would be more isolated than that.

You would think but they are not. I have seen it a few times. I think Shawn from AED has a dyno video showing it in real time.

 

[Grubb]

I'm going to go way out of the field here and ask if you've replaced anything on your exhaust lately? some of the hangers in our car if they're installed upside down will make contact with the body causing false knock and making the computer pull timing. Normally in the higher RPMS.

No exhaust changes


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[BEAST]

No exhaust changes


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I would check, did you hit anything or scrape on a speed bump? It's the best free solution I can think to check.

 

[Marble]

I thought I had knock at high rpm going on but it was the side of my header contacting the the engine compartment. The poly mount had sagged just enough to let it hit under high RPMs or a hard left turn.

Doesn't seem like this is the ops problem though.

 

[07gts197]

It probably is phasers or timing related. I know that the 05's are known for their problems with phasers and timing chain tensioners. Maybe some of the early 06's had the same problem. Could have also jumped a tooth if the tensioners failed


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