Rep Power: 633

my rpms are going haywire up and down to 5 000 down to 1000 the thing is my car is idling and reving perfect. The rpm gauge is all ****ed up i installed a used dizzy but the proper 1. Mayb the ignitor wires are looose or ignitor is going, i got no idea. can someone help me out

 
Rep Power: 624

Have you tried another cluster?

 
Rep Power: 0

i had the same problem it was the igniter.