Ok tongiht i was driving home and my tach started bouncing from like 2 k to about 4 k and it would stop then do it again... What would casue that to happen???? there was no miss or anythign the only reason i noticed was i looked down at my tach and saw it boouncing. Also would my EGR have anything to do with it i put some gasket maker around it tonight and the old gasked hat like 5 pinsize holes in it near the edge and allot of carbon by it so i was hopeing this will solve my egr problem but whats up with my tach now

 

Something in the ignition system is probably loose. Make sure all your wires and things are connected correctly.

Alex