Need some professional advice. My vacuum gauge wobbles at low RPM then smooth's out at about 1700. At idle no reading at all. I replaced the gauge and same problem. My vacuum pump is good but at times at sticks then after a moment or two and more RPM it loosens up and starts to work fine but gauge does same thing. I know a pump either works 100% or not at all. I suspect the relief valve or a line collapsing but not sure...
ANY THOUGHTS YOU CAN PROVIDE WILL BE HELPFUL IN TRYING TO SOLVE THIS PROBLEM.
Thanks in advance for any comments.
