My 92 F250 7.5ltr 460 4x4 idols real rough.
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Joined: Jun 2010
Posts: 16,561
What one person describes as a rough idle , another person might describe as a slight misfire. SO,,,,,,,,we might need some addl info.
Does the idle smooth out if you raise the engine speed a little? If it does , that could indicate a vacuum leak that the system cannot compensate for at idle.
If it does not smooth out , it could be a slight misfire, in which case further checking is required. Sometimes a broken /leaking vacuum line can produce this symptom.
Did you do a thorough visual inspection to see if anything seemed out of place or appeared wrong?
What kind of maintenance has been done , when, and how many miles are on the odometer?
All these things can influence if problems come up.
Does the idle smooth out if you raise the engine speed a little? If it does , that could indicate a vacuum leak that the system cannot compensate for at idle.
If it does not smooth out , it could be a slight misfire, in which case further checking is required. Sometimes a broken /leaking vacuum line can produce this symptom.
Did you do a thorough visual inspection to see if anything seemed out of place or appeared wrong?
What kind of maintenance has been done , when, and how many miles are on the odometer?
All these things can influence if problems come up.
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