What Causes Cars to Idle Low?

Answer

There are a few reasons that may cause cars to idle at low levels. One reason may be because the idle level is not set correctly. A couple of other reasons may include a low fuel pressure or low oil pressure.
Q&A Related to "What Causes Cars to Idle Low?"
A loose or broken vacuum hose causes rough idling, and is the easiest repair of all. This is a very common problem since hoses wear out over time. Look in your engine compartment,
http://www.ehow.com/list_6107077_causes-rough-idli...
If the engine is idling very low - oil pump may not generate enough pressure, causing light to come on. Make sure you have adequate oil, and that idle speed is correct. If this does
http://wiki.answers.com/Q/What_could_cause_the_low...
i own a repair shop ,and there's a lot of things that will cause a low idle on any car,for one a dirty air filter will cause one to about die when its idling,and also a bad gas filter
http://answers.yahoo.com/question/index?qid=200703...
Bobby: You took the car in to a shop and had something fixed on it. The car ran fine before it went into the shop but will not ran or idle very good. Take it back to the shop and
http://en.allexperts.com/q/Mitsubishi-Repair-824/2...
1 Additional Answer
Cars that idle low tend to shake frequently and even stall when the brakes are applied. Possible causes include a vacuum leak, a fault in the computerized engine system, or broken linkage. First check and replace the vacuum lines to rule out a leak. Then use a scan tool to check the computerized engine system. After testing the circuits, replace the necessary components. If the problem is a broken linkage, it will have to be repaired or replaced.

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