wonder if you could use Royal Purple coupling grease as it will not separate like normal grease (EP 2 ) does at high centrifugal speed? just wondering

Update....... Didn't drive the car much this year, been driving the Impala all over..... Took the Chevelle out last week for a local show..... the car ran perfect as usual... On the way home after getting off the highway I noticed the engine was running rough...... Humm!!!!..... I was 10 minutes from home so when I got the car in the garage (no check engine light) I plugged the scanner in and no codes....... Hummm!!!!!......Used the infared heat gun and shot all the Header pipes...... #3 cyl was showing no heat....... Humm !!!!....... Put a spare coil on and started it up .......Same thing......Pulled the spark plug and it looked O.K........ Checked for spark and everything good......Hummm!!!!!......Got Air....Got Spark..... Fuel????...put a Noid light on the plug on injector #3 and everything good....... Hummm !!!!...... The only thing that made any sense was that the injector went bad (36,000 miles)....... Ordered a new set and put them in and the car run's perfect again......... You never know...... LOL

Nice that you got it figured out, fast!!:biggthumpup: