tach is bouncing around 2000 rpm

[ehummelman]

Everything worked fine before I had to pull the engine up (not out) to replace the oil pan. To do it, the grounds off the back of the heads and the distributor wires (it's an HEI) had to be disconnected. Now it's bouncing like I said. Common sense tells me it's a loose ground or maybe tach signal wire but I've tightened them up, at least the ones I can find.



Any other reason this could be happening? Maybe coincidentally something in the HEI went bad? Any clues or things to trace down would be great. Thanks!