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Technical / Re: rev counter issue
Last post by Monkey -I'd start there next, there's a procedure to time it up, that takes the blue sender out of the equation.
Also, there could be an air leak somewhere:
When it's cold, you're putting in extra air, so the mixture is more balanced, once warm, it's out and your under fuelling.
Get a can of brake cleaner and spray it around the inlet boot and vacuum, lines.
If it changes and picks up at all, you know you've got a leak.
Just be careful around the exhaust manifold.