rev counter flying off the chart on boost, usual gremlin poxy loom plugs,take them apart spray with electrical fluid all fine for a week then starts again,so soldered a couple of suspect wires together, then did what i saw on a post with same problem. re earth inlet manifold and earth ignition module cleaned up couple of other earths, havn,t test run yet as its raining don,t want to get it wet and shity.