gmrulz4u Posted September 8, 2007 Report Share Posted September 8, 2007 Lately I have been going through the various systems and sensors on my 89 Cutlass just to make sure everything is within spec and I suspect my Canister Purge Solenoid is bad, in other words, stuck in the OPEN/PURGE position. The first step in diagnosing it is to apply 10" hg of vacuum to the port side of the Solenoid with the Key in the ON position, I try and try but it won't hold any vacuum at all, it leaks down immediately. Therefore it is purging all the time and recirculating fuel vapor even at idle, which is probably why I have been running Rich for the longest time, especially at idle. Anyone have any experience with this system as far as diagnosing, replacing, issues they can when faulty etc... THANKS! Quote Link to comment Share on other sites More sharing options...
ron350 Posted September 9, 2007 Report Share Posted September 9, 2007 Guess you know that the top port has to go to the throttle body. The lower port will not hold a vacuum only the top port will. The valves I have looked at have CAN beside the lower vacuum port. Sometimes the valve gets carbon build up and needs to be cleaned. Quote Link to comment Share on other sites More sharing options...
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