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Aftermarket Tacho help

Posted: Fri Sep 26, 2008 8:41 am
by ToNkA
Speco in dash unit.

Was wired up for me, hence I'm a little lost with this one.

It was working fine, perfect even.
Took the car off the road for 6 months to do body work and such.
Started it back up, been driving it for a week and the Tacho wont read past 2,500rpm.
Engine (1ggte) revs fine but tacho reponds but then just stops.

Any ideas? What would cause that, what I should be looking for?