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from the engine?

sounds like spark knock

timing issue or improper fuel

try another knock sensor if fuel is correct in it

from my adventure, if u take out the familiar radio and put in a much better priced a million that doesnt up the regular value of the automobile like u ought to think of it might, the alloy wheels could make a small diff, and in spite of else you completed, I certainly have a 'ninety six" escort that i offered in 01 and it in basic terms had sixty 8,000 miles on it and in 2001 it had alot much less miles and that i paid 4,000 for it then, which became certainly fairly intense.I sld it a month in the past for 2,2 hundred and each element became inperfect workin condition whn i offered it, the aircon ect, if i've got been u i might def take out my stereo and stuff and positioned the familiar a million returned in , if u nonetheless have it. sturdy success