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    98 7.4 rough idle and stumble.

    Hey there guys. I’ve searched both the forum and some FB groups I’m in, and I’m probably more confused than when I started. I have a 98 GMC 2500 w/ a 7.4. Not always, but sometimes it develops a rough idle (as if it’s got a lopey cam), and sometimes it sputters / stumbles from a dead stop. Not...
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