Hi guys.
I noticed that my pathy started idling rough recently. It idles up and down. But rpms stay constant. First i thought about the spark plugs. The truck has got 102 k miles down and I was going to replace them anyway.
But I also noticed that the fan starts upwhen turning on the engine. It then continually stays on.
therefore I'm wondering if it might be the fan clutch. Or a bad tensioner.
Did anyone ever experience this? Any advises?
rough idle in park. spark plugs or fan clutch?
Moderator: volvite
It idles up and down but the RPM stay constant? Does that mean it's surging? If it is, surging usually occurs due to a lean condition. Check for splits in the rubber intake ducts and for possible vacuum leaks. 102K miles is close enough to replace the spark plugs; stick with the original type NGK. A bad tensioner will usually result in belt squeak and a bad fan clutch will result either in a loud "roar" all of the time or overheating at low speeds and idling.
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