Knockers are killing me- Help!
Help! My 1990 5.0 purchased new in 1990 with 83k on it and bone stock has always run like the wind; perfectly. now all of a sudden, under WOT my boys are knocking near the end of the rpm range, around 4000-4500. Have always run 87 octane and never had a problem. any ideas? bump the timing up help?
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1990 LX 5.0 Cobra Intake K&N filter ET 15.0 Yokohama ES 100. Cobra R 17's DynoMax SS's Pro 5.0 More to come
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