is the pop pop pop in the exhaust at idle and felt like a pulse when you put your hand near the tailpipe? An incorrectly adjusted exhaust valve or burnt exhaust valve can exhibit similar symptoms as well as unmetered air between the MAF & throttle body.
with #5 plug try swapping another lead to it and see if the issue remains or follows the lead when its used in say #4
if it remains at #5 then check the plug & re verify timing as mentioned above - set to 3deg bdtc?
with #5 plug try swapping another lead to it and see if the issue remains or follows the lead when its used in say #4
if it remains at #5 then check the plug & re verify timing as mentioned above - set to 3deg bdtc?
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