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Old Aug 11, 2010 | 05:16 PM
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Hmmm..

Ok I have a 2000 ford f-150, my problem is that my engine is shaking and there is a knock. Usually when i'm decreasing in speed. I already changed the spark plugs and wires so i dont know. Can anyone help?
 
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Old Aug 11, 2010 | 05:30 PM
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Welcome to the Forum....We are going to need more info to help diagnose the problem,CEL? Miles showing,V8/6,Automatic/Standard etc.If its the V-8 we,ll need to know the size,v-6 has always been (to my knowledge) a 4.2.
If you DO have a CEL(Check Engine Light) the code(s) would be helpful.
Im sure once the above info has been posted,someone will have some good pointers............
 
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Old Aug 11, 2010 | 05:32 PM
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thrown rod? motor mount? the list goes on...
 
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Old Aug 11, 2010 | 06:48 PM
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It's a V6/ 4.2, Automatic. I tried a new coil pack too, but sadly still not the solution. It sounds like a diesel engine and it does shake when i give it throttle ( in gear). Some friends said it could be a fuel problem. I'm still unsure. However I'm taking it to get a compression test dont tomorrow.
 
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Old Aug 11, 2010 | 06:50 PM
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The CEL is on and it does two different codes i'm imagining. It will either stay lit or it will end up blinking alot. No, i haven't counted so I guess that is useless.
 
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Old Aug 11, 2010 | 09:06 PM
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i would be more interested in the codes than the compression readings.
 
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Old Aug 11, 2010 | 10:49 PM
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well id imagine everyone can agree, its obviously a miss. a knocking sound, a shake, and a flashing CEL. time for new spark plug wires, spark plugs, and coil pack.
 
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Old Aug 11, 2010 | 11:26 PM
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Originally Posted by 93 mix 'n match
time for new spark plug wires, spark plugs, and coil pack.
He said he already replaced that stuff. As mentioned before, CEL codes would be helpful.
 
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Old Aug 12, 2010 | 09:52 AM
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he probably mixed up one of the wires. its either a problem with the ignition or with a fuel injector.
 
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Old Aug 12, 2010 | 09:57 AM
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No I did one at a time, just for that reason. So I know I didnt mix a wire up. I counted to 39 blinks before i quit counting.
 
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Old Aug 12, 2010 | 10:00 AM
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Plugs and wires replaced already, I would replace coil pack.

When was the last time the fuel filter was replaced? If it is not a spark issue then it would be a fuel issue.
 
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Old Aug 12, 2010 | 10:06 AM
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Originally Posted by C.Stranahan
No I did one at a time, just for that reason. So I know I didnt mix a wire up. I counted to 39 blinks before i quit counting.
check for loose plug wires or loose injectors/wires. something like that.

a blinking CEL is a constant miss. enough of a miss to throw a code. so go to autozone and get your codes read.
 
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Old Aug 12, 2010 | 01:18 PM
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Well i tried some seafoam and still no luck. I had a master ford mechanic look at it too and he said that the compression is low.
 
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Old Aug 12, 2010 | 01:33 PM
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Now when I accelerate my battery light comes on.
 
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Old Aug 12, 2010 | 01:53 PM
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Well I guess it's time to tear apart the engine. Thanks for the help folks!
 
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