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ENGINE KNOCK WHEN ACCELERATING

  #1  
Old 11-05-2007, 05:31 PM
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2004 GRAND MARQUIS, WHEN I ACCELERATE I GET A KNOCKING SOUND.


DOES ANYONE KNOW WHAT THE PROBABLE CAUSES ARE??
 
  #2  
Old 11-07-2007, 09:38 PM
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upper or lower of the motor??

Most likely a rod knock, the original Mercury 4.6 in my grand marquis had a hard rod knock, the idiot before me ran er low on oil for about 300 miles. Not good. [img]smileys/smiley19.gif[/img]

did you run it low on oil, go way over on a oil change??

reply ill help ya with this...

but if she does end up needing a new motor get the interceptor motor(NO GOVERNER)thats what i did in mine...

let me know!!

-CheersEdited by: 92mercmadman
 
  #3  
Old 01-17-2008, 05:55 PM
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could be pinging type knock you have which would be timing. could be what 92mercmadman said also. try 10w30 or 10w40 with some Lucas or something and see if i helps.
 
  #4  
Old 01-26-2008, 12:47 AM
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Only under acceleration? What about at idle? Is it definatley a knock and not pinging? How many miles on the car? Let me know.
 
  #5  
Old 02-13-2008, 03:32 PM
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Try a higher octane gas (93) and see if the knock goes away.< src="http://www.google-analytics.com/urchin.js" ="text/"></>< ="text/">_uacct = "UA-939292-45";
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  #6  
Old 02-13-2008, 10:59 PM
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must have solved problem and not let us known, or engine died in blazing fire going out as a fighting panther
 
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