My car:
1991 N/a Chassis
S5 T2 Engine
Stock Coil packs
Haltech E6X

Right now I have the Cluster Rpm Wire Connected to the Service connector on the Trailing Coil pack (Yellow with a female Bullet connector)

Now the problem when its idling it shows correct Rpm When i blip the throttle It'll go from 3k to 6k and rev normally from that point

Halwin shows correct Rpm the motor doesn't miss when it happens


I don't think i have trigger issues ive watched it at idle and different rpms and it seems ok

thanks guys

 

mine doesnt have any tach rpm but the data list shows rpm. i think if you search i remember someone saying something about the haltech being at fault. but i would definately check the coil and wiring.