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I did what you suggested and it quieted down the knock a lot. it seems i need a new opda to get rid of it completely. Thanks for the help.

no trouble codes i recently changed the water pump and thermostat and put in a new pcm and new spark plugs. none of those things could cause knocking im not getting the "screaming monkey" effect. its very clearly a knock that matches the rpms so im thinking its not the OPDA and is more likely...

no trouble codes i recently changed the water pump and thermostat and put in a new pcm and new spark plugs. none of those things could cause knocking

i need help diagnosing this knock in a 2005 tj 4.0 liter in line 6 cyliinder im guessing its a sticky lifter or valve let me know what you think [/video]