Thread: Truck advice
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Old 05-31-2012, 09:18 AM
MR-G MR-G is offline
LawnSite Senior Member
Join Date: Aug 2010
Posts: 479
we have a 98 f150 with 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 more problems...also want to check the EGR ports as ours had carbon chunks in them as well.....
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