Thread: Truck advice
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Old 05-31-2012, 08:18 AM
MR-G MR-G is offline
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Join Date: Aug 2010
Location: CENTRAL FLORIDA
Posts: 474
we have a 98 f150 with 200k....no rust here in florida but had encountered the same type of problem at 130k or so...turned out to be a fairly large chuncks of carbon had built up and the broke off and was lodged in exhaust ports...noise always went away when you push on the gas and sometimes would cause engine to hesitate or stumble at lower speeds...removed both manifols and cleaned out carbon....no more problems...also want to check the EGR ports as ours had carbon chunks in them as well.....
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