Erratic rev counter And engine holding back

[spriteley55]

have changed numerous parts of the ignition system to try to eliminate these problems but had no joy - any suggestions welcome, thanks

[Jon Tilson]

Year and model and location would be helpful.

Jonners

[spriteley55]

Year and model and location would be helpful.

Jonners

1977 model sprint auto - I live in Hertfordshire

[Howard81]

An identical problem with my Sprint turned out to be the electronic ignition module slightly lose. The screw in the kit was fractionally too long so didn't hold the module down properly.

[Carledo]

I've often found an erratic (or non functioning) rev counter to be a pointer to a coil fault. Its also possible that the rev counter itself could be causing the problem, on a lot of Triumphs the engine won't run if the rev counter is disconnected (or duff) Obviously check all the connections into the rev counter before swapping it, especially the earth. But i'd try the coil first!

Steve

[steve5]

Just had a similar thing on mine which turned out to be a partially separated wire from the fuse box, (the pair of purple ones), it actually affected a few thing but the only easily noticeable one was the rev counter. I think I probably bent it when changing the steering UJ.

[sprint95m]

Its also possible that the rev counter itself could be causing the problem, on a lot of Triumphs the engine won't run if the rev counter is disconnected (or duff)

Only on the models with the rev counters connected to the positive terminal on the coil,
which for the Dolomite range applies only to the early 1850s (with the rubber connector blocks in the wiring loom).




Ian.