I have noticed my tach hangs up on 5k for a second and then jumps to 6k but the motor is linear. What could be causing this. The tach is electronic so there isn't anything to lube is there? Thanx for any help Pat Martin 864000csq 2 1/2 cat back, H&R-Boge,advanced and loving it. Drilled and stopping it. Koenig Cobra 16x7 with AVS Intermediates. 95 subaru legacy awd: so stock it hurts Bothell,WA