RE: [DML] Frequency valve buzzing when key in "ON" position?
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RE: [DML] Frequency valve buzzing when key in "ON" position?




Your problem may be a sluggish fuel metering plunger. If it is returning 
slowly to
its equilibrium position after you release the air sensor plate the injector 
may continue to spray for a while. You could also have a fuel pressure 
issue, but most likely the plunger is sticky.

None of your injectors should spray unless the air sensor plate is 
depressed, so the initial behavior of #3 is correct. It should stop spraying 
when the air sensor is released, however. Cleaning may or may not correct 
this. Consider sending your injectors to John Hervey for cleaning and 
testing if using a few tanks of premium fuel (typically higher detergent 
levels than regular) does not fix the problem.


-Joe  Kuchan


>2.  I was testing the #3 fuel injector.  When I jumped the RPM relay
>and placed it into a bottle, it didn't spray.  I pressed down on the
>air meter plate, and it sprayed, but when I let go of the air meter
>plate, it continued to spray until I "un-jumped" the RPM relay.  Is
>this how it's supposed to act, or is my distributor plunger
>sticking?  I have had the distributor out of the car for about a
>month, so I wasn't sure if it needed to have gas flowing through it
>to lubricate things again or not?







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