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    2003 LS V8 lot of noise under car, won't run

    Not sure about the cats. How do you check them? What happens if they are clogged? Ran great about 3 weeks. Fuel pump is good, no vac leaks. Don't remember the brand of COP but got them from Advance Auto Parts. I don't have a scanner and I have disconnected the battery.
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    2003 LS V8 lot of noise under car, won't run

    Was having trouble with MAF and coils. Replaced, ran great. Then all of a sudden, car started making a lot of noise under neath, backfiring really bad and won't run good enough to back out of the driveway. No check engine light!! I'm stuck. Any ideas?? Could really use some help. Thanks.
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    No Start - Strange Noise at Crank - 2003 LS V8

    2003 lincoln ls v8 good battery spinning noise from starter no start Hey. Same problem as others. Anybody know what the problem is? Mine just started.
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