2007 engine power issues

[Kennyb65]

Hello, my 2007 EL limited has developed a ticking noise and it also has low power while driving. It has 118k miles, no codes, have changed the spark plugs, oil and added Lucas oil stabilizer. I have a code reader that I can view live data with while running. In the drive way and revving the engine, the timing advances to 40 and stays there. When driving the timing drops to 0 and less and it takes a while to get to 60 mph.

Any ideas?

 

[docraymund]

Check the spark plugs first for proper torque.

 

[Kennyb65]

okay, I checked the torque and no change. I am suspecting the right phaser wheel is making the clicking noise. I am also thinking I may have a vacuum leak. I'll check for that today.

 

[docraymund]

Also check for dirty air cleaner and dragging brakes.

 

[Kennyb65]

new air filter and recently new brakes; no dragging noticed

 

[Kennyb65]

The vacuum lines look old but cant tell if any are leaking

 

[theoldwizard1]

The vacuum lines look old but cant tell if any are leaking

Spray carb cleaner around where the suspect leak is while the engine is running. If the idle speed picks up, you have found your leak.

 

[Kennyb65]

i talked to a ford mechanic, he said the phaser wheel is causing my problems

 

[Kennyb65]

Just to close this out...

My problem was a bad rocker arm on the #1 cylinder. Replaced it and the expedition runs like new. My assumption is that the rattling of the rocker triggered the anti-knock sensor and it retarded the timing.

 

[1955moose]

Glad you found your problem. I don't know about a loose rocker causing a knock sensor to retard timing, but hell anythings possible on a computer controlled vehicle. The worn rocker kept that valve from opening and closing properly, leading to loss of compression/ power on that cylinder. How did he find the worn rocker?


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[Rigpig]

I love a happy ending.

 

[1955moose]

Don't you though! It's like a Hallmark Christmas movie, but with cars instead of good looking people!


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[TDCorbett]

My 2007 Expy had a pretty loud tick when I bought it, I was planning on replacing the cam phasers but when I pulled the valve covers off it was just two rocker arms. One on each side. They wore my cam down a little but I replaced them and it sounded like a brand new engine (with 200k!) Now at 230k+ it's getting another tick, I'm hoping it's just another rocker arm but I'm worried it may be because of the worn cam. Anyway, it seems most people think it's the phasers every time but it's always worth checking the rocker arms! Very cheap and easy fix compared to phasers!