Loyale93v Posted March 24, 2010 Share Posted March 24, 2010 93 subaru loyale- 75,000miles has a rough idle, not real rough just not smooth. Last night i noticed the lights were flickering at idle...alternator? recently I had the drive belts off for a w-pump/t-belt. could they not be tight enough? what is proper belt deflection for these cars? any other ideas? I do get a belt squeal in the rain....:-\ Quote Link to comment Share on other sites More sharing options...
ettev Posted March 24, 2010 Share Posted March 24, 2010 I'd say alt/alt belt. I install new ones pretty taught with little deflection. Not so tight that your stressing alt bearings though. Maybe 1/2" deflection. Quote Link to comment Share on other sites More sharing options...
ivantruckman Posted March 24, 2010 Share Posted March 24, 2010 how low of rpms is it idling. glowing lights are an indicator of craptachi anternator problems, try to tighten the belts, but i think it may be the alternator, there pretty wimpy . rev it up and check the volt guage . make sure the volts are not spiking to . like 18 volts or more Quote Link to comment Share on other sites More sharing options...
Cougar Posted March 24, 2010 Share Posted March 24, 2010 (edited) The alternator belt should be good and snug but not over tight. You may be seeing the flicker because there some bad diodes in the alternator. Some flicker is normal at low idle. Have a load test done on the charging system and it will show you what the condition of the alternator and battery are and then you will know for sure what to do. Going by the mileage, you may find that the idler pulling bearing may need to be changed out sometime in the near future. Edited March 24, 2010 by Cougar Quote Link to comment Share on other sites More sharing options...
Loyale93v Posted March 24, 2010 Author Share Posted March 24, 2010 ok, thanks. I will check out alt voltage and belt deflection. Then I will get back to you guys. Thanks! Quote Link to comment Share on other sites More sharing options...
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