Weird tacho!

[Cullen]

For several years now the tacho in my Mk2 Invader (Cologne 2.8 engine)has never gone beyond 1k. Today I started the car for the first time since October and let the engine idle, but occasionally blipping the throttle up to 3k + and the tacho seemed to work perfectly. Later I took the car out for a run but the tacho had reverted to its 1k limit! The wires and connection all seem OK. Any suggestions?

[Ian-Genie]

Need more info really. Do you have electronic ignition or an ECU, or is it a standard distributor and coil set up? Is it a Smiths tachometer and if so is it an RVC or RVI (there is a code on the dial). Do you know where the tachometer gets its signal from? Cheers, Ian

[6sabre]

Tachos get impacted by electronic ignition. The 2.8 has an electronic coil pack iirc.
The Invader will be RVI due to age. You can get a conversion kit from Spiyda to update the tacho. or they will do it as well I think. Or the 'gaugeshop.com'