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Check/ replace the TPS if the idle is up and down.
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∙ 15y ago
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Why a Rough idle on 1990 Lincoln town car 5 liter?
A rough idle on 1990 Lincoln Town car with a 5 liter engine can be caused by the fuel injectors. The least expensive way to test this is to purchase a fuel additive designed to clean injectors. If the problem persists a mechanic should be consulted.
What causes a 2000 4.8 sierra to run rough at idle?
Your 2000 4.8 liter Sierra might run rough at an idle because of clogged fuel injectors or a clogged fuel filter. You might also have gotten water in the gasoline.
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Why does my 1992 ford Taurus 3.8 liter engine hesitate on acceleration and idle rough when warm?
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What make the car to idle rough you changed the plugs?
When the idle goes rough, you must idle the plugs. Else the car plugs roughly.
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With mine, the rough idle was fixed by changing the spark plug wires.
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If an alternator is going bad it can cause a rough idle in a 1993 Subaru Legacy. Cold temperatures in the winter can also cause a rough idle in the Subaru Legacy.
