Quote Originally Posted by David T View Post
As pointed out a lot of things can cause this symptom. On one car the frequency valve was not working. All it took to fix it was to take the plug off the valve and put it back on several times to clean up the dirty connections. You can't properly fix this by throwing parts at it. In the process you will be taking off a lot of good parts and may actually fix the problem by disturbing the actual cause and not even know it. You will, of course, believe that whatever part you replaced at that time was faulty and now it fixed it! Go see of the frequency valve on the right valve cover is buzzing. While you are looking, see if there is a plug in the mixture screw hole.
David Teitelbaum
David,

I will look it over tomorrow and see if I hear anything also check the connection. I was thinking it wouldn't hurt to replace the injectors regardless, I'm not sure but they look original. Thanks for the advice.