1980 280ZX N/A. Stock except EGR delete. When connecting my ohmmeter to the TVS following the procedure set forth in the EFI bible, it is producing wildly fluctuating numbers when rotating the TVS clockwise to indicate the circuit is closed. Also, it is producing wildly fluctuating numbers when rotating it counterclockwise. I have 19hg vacuum at the booster, and 28psi fuel pressure at idle(engine at normal operating temp). Edit: ignition timing set to 12degrees BTDC My friend is coming by later with another ohmmeter. I will run the test again, but if I get the same results, would it suffice to say that the contacts inside are worn/misaligned? It is the TVS type that is rivited together. It is unmolested, but not original to this car. Its from my '82 parts car. The original TVS that was in the car was causing severe rpm drop at idle. It too has never been taken apart. The symptom that caused me to check it is a very slight stutter when the accelerator pedal is applied very lightly. Only in one position, and operates smoothly in all other positions. Edit #2: The problem is intermittent. It may very well be that I'm being a bit ocd about the stutter. Its hardly noticeable to me, and unnoticeable to others who have driven it. The ohmmeter numbers are indeed throwing me for a loop. Apologies for the lengthy post, just wanted to try to cover all the bases I could think of. And thanks in advance for advice.