2006 expedition 5.4 loss of power at high rpm
I have a '06 expedition , runs great at normal driving speeds but if you get on the accelerator to pass another car it seems like it has no power. rpms will go up but no power increase. Plus I can hear what sounds like a spark knock. Just put new plugs, replaced 2 bad cops new air intake and breather box. Local mechanic can't find anything wrong with the motor. No codes. He thinks I might need my brain flashed at dealer. Any ideas? Thanks!
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how are the codes being checked parts store or scanner was the truck running bad before tune up
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06 expedition
Originally Posted by carguy94
(Post 14189886)
how are the codes being checked parts store or scanner was the truck running bad before tune up
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make sure you find out what the issue is dont through parts at it and find out what codes are like you said if any. a plugged converter will cause lack in power it sounds like something is still not right with the engine
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Originally Posted by carguy94
(Post 14190850)
make sure you find out what the issue is dont through parts at it and find out what codes are like you said if any. a plugged converter will cause lack in power it sounds like something is still not right with the engine
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any leaks around the intake or mis assembly could give you lots of issues get the codes pulled and to get an idea at least as to weather or not the intake could be leaking or if someone caused a vacuum leak of some sort you could take carburetor cleaner and spray lightly around the intake not in but around it did you replace the intake
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Originally Posted by carguy94
(Post 14192869)
any leaks around the intake or mis assembly could give you lots of issues get the codes pulled and to get an idea at least as to weather or not the intake could be leaking or if someone caused a vacuum leak of some sort you could take carburetor cleaner and spray lightly around the intake not in but around it did you replace the intake
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Originally Posted by zimzim35
(Post 14193500)
I didn't replace it mechanic did. They did the plugs and coil pack too. I usually do my own work put I figured since they where doing the work on intake through my insurance, I would have the do the plugs too. Glad I did as 7 of 8 plugs snapped off. Truck had 2 bad coil packs so it ran terrible before. Runs better now accept for the symptoms I posted. It does seem like it my be sucking to much air at high rpms. Hopefully scanner will tell me something today.
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good to hear hope the coil will fix your problems sorry that i could not come out right away with a answer but i i will never guess but if you still have issues and any more information let me know
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Originally Posted by carguy94
(Post 14194880)
good to hear hope the coil will fix your problems sorry that i could not come out right away with a answer but i i will never guess but if you still have issues and any more information let me know
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