Update #2. I checked the vaccum today. Some of the information on Alldata is good! The info to check the vaccum helped me find the first indication. The vaccum was good at start 19-20 HG. Then it stsrted to vary 2-3 inches indicating ignition problem. Got my trusty tester out and checked spark puug wires. When the RPM drops No spark for just a sec. then spark again. Now What about the Overvoltage protector relay? Or something else? Cannot locate that OVP relay . It is not in the relay box under hood on pass. side. Where is it? Norm

1996 E320 120,000