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98 4.2 v6 f150 idles rough in drive and sputters when driving I've changed plugswiresand O2 sensors what else can it be?
Wiki User
∙ 15y ago
Have you connected to a diagnostic code scanner?
The computer turns on the "check engine" light to tell you that a problem exists. Sometimes, however, it doesn't turn on the light when it detects a problem. Either way, a code scanner is the preferred way of figuring out what's wrong.
You can borrow, rent or buy code scanners at most auto parts retailers, and many will even help you connect the scanner and figure out what it's telling you.
Throwing parts at a problem is a waste of parts and typically doesn't solve the problem.
Wiki User
∙ 15y ago
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