1992 Toyota Paseo Q&A
1992 Toyota Paseo Question: idle is rough
recently replaced 02 sensor and idle air control valve also did tuneup before this now car idles at 800-1000 rpms but it is rough whats wrong? - Visitor
Check that you have the firing order correct as this will cause any car to run rough on idle! If this fails then it could be a case that your spark plug gaps are too close/ far apart from what they should be to get correct spark! Another good thing to check is the colour of the spark plugs to see if there is soot on the plugs as this could be a sign that the car is running too rich - Visitor
A rough idle and even an emissions inspection failure for high HC and CO can be caused by improperly adjusted valves. Also, exhaust valves may become to tight which can lead to valve failures. Ou...