DownUnderFlier Posted December 29, 2017 Report Share Posted December 29, 2017 After doing a bunch of maintenance work (replacing the LargeEngineFrame (old one bent & cracked), 5yr Rubber replacement, Firewall heat-shielding, new FuelPump, Header-wrap, etc) I did an oil purge, checked valve tappets and it starts and runs beautifully on 1&2. At about 3000rpm, get a drop of 150rpm when switched to ignition 2, but when switched to ignition 1, the rpm goes back UP to same as 1&2 ! Turn to "off" and the engine keeps running ! (FlyDat goes blank but the engine keeps running smoothly) Have gone over the earthing points and cleaned all the surfaces with emery paper - no change. The Ignition Modules are the older style, 4-pin connector types.. Any thoughts greatly appreciated. David Merry Christmas and Happy New Year. Link to comment Share on other sites More sharing options...
Anticept Posted December 29, 2017 Report Share Posted December 29, 2017 Your ignition switch ground is bad in the off position. Check it for continuity to ground from the module connectors. Link to comment Share on other sites More sharing options...
Roger Lee Posted December 29, 2017 Report Share Posted December 29, 2017 I agree with Corey. Either the wires are loose on the back of the ignition switch or you forgot to connect some ground wires during the hose change ? maint. Link to comment Share on other sites More sharing options...
DownUnderFlier Posted December 29, 2017 Author Report Share Posted December 29, 2017 Thank you, Corey and Roger. Checked the IgnitionSwitch wiring, Ground was good, IgnitionSwitch functioning correctly, & continuity to end of each white Grounding wire at IgnitionModules was good. Then I found the problem ... a sneaky, internally-broken brown wire (wire felt like it had no 'backbone') near the connector where the white Grounding wire comes from the IgnitionSwitch to the bottom IgnitionModule - so it could never turn off. Fixed that and now it is working like it should. Thank you again ! David. Link to comment Share on other sites More sharing options...
Anticept Posted December 29, 2017 Report Share Posted December 29, 2017 That was going to be my next suggestion after making sure the ignition is alright! It is an old engine, so I am not surprised. Link to comment Share on other sites More sharing options...
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