rpms

[joecassie]

my mph work but not my rpms can any one help me out

[E30 325i]

Oh man, you need to be "a little" more specific than that...

what car do you have?
what motor did you put in?
Did you wire this yourself? If so, did you make a pin out chart??

We need more details to help you out man

[dogsbark26]

Replace tachometer or entire instrument cluster.