OliverSedlacek Posted May 25, 2011 Share Posted May 25, 2011 After several years of reliable operation my XFlow has recently been suffering from a missfire when running on a Megajolt wasted spark ignition. I swapped it back to points and distributor to confirm that it's definitely an ignition problem. The missfire is at about 4000 RPM. I've changed: The Megajolt The EDIS The crank sensor The spark plugs The battery Has anyone got any suggestions? Link to comment Share on other sites More sharing options...
Markiebabes Posted May 25, 2011 Share Posted May 25, 2011 Plug Leads ? 😬 Link to comment Share on other sites More sharing options...
jonboylaw Posted May 25, 2011 Share Posted May 25, 2011 Oliver check the following: 1) Crank sensor to trigger wheel, is the bracket vibrating/lose or the distance too great? 2) Did you use screened cable on trigger sensor, check that the shield is earthed 3) Check all connections ro the Edis and coil pack 4) Check that you are indeed seeing the spark advance (plug in the Laptop) 5) Try a new coil pack and EDIS unit ir Sensor if you have them. Is this a new set up or has it been running fine and now playing up ? Jon Link to comment Share on other sites More sharing options...
OliverSedlacek Posted May 25, 2011 Author Share Posted May 25, 2011 As mentioned, it ran fine for a couple of years. I've swapped all the bits except HT leads (which are hard to get hold of) Link to comment Share on other sites More sharing options...
jonboylaw Posted May 25, 2011 Share Posted May 25, 2011 Oliver, I meant was it working fine on the MJ previously. Plug leads, I got mine from Triggerwheels. Jon Link to comment Share on other sites More sharing options...
OliverSedlacek Posted May 26, 2011 Author Share Posted May 26, 2011 Yes, it was running fine on the MJ for a couple of years. It did spend the first 18 years and 100,000 miles on points. Link to comment Share on other sites More sharing options...
jonboylaw Posted May 27, 2011 Share Posted May 27, 2011 Hi Oliver, if you have replaced all the HW, then look at the wiring and brackets and TPS (well they are the only things left to try.. ) 1st thing I would try is to plug in the Laptop and monitor the advance to make sure it is doing what is expected and look what happens at 4000RPM. Check that the load sites are moving correctly with throttle application. If that all looks good, then I would start checking all connectors and earth points to make sure there is not a dry joint or shielding issue. If you were close by I would loan you my plug leads etc.. Jon Link to comment Share on other sites More sharing options...
John Hughes Posted May 27, 2011 Share Posted May 27, 2011 Had a similar problem on my previous car (1700 SS) Was a tired mechanical fuel pump - all of a sudden it couldn't pump enough fuel so misfired after hard acceleration or when running at 70 or more on the motorway. John Link to comment Share on other sites More sharing options...
jonboylaw Posted May 27, 2011 Share Posted May 27, 2011 John, Oliver stated that the missfire goes away when he switches back to the Dizzy so it does not sound like a fuelling problem. Jon Link to comment Share on other sites More sharing options...
John Hughes Posted May 27, 2011 Share Posted May 27, 2011 Jon "Fair point well made" I hadn't taken that into account Link to comment Share on other sites More sharing options...
OliverSedlacek Posted May 31, 2011 Author Share Posted May 31, 2011 I'll be switching back in a bit, after I've enjoyed the car a bit. Link to comment Share on other sites More sharing options...
jonboylaw Posted May 31, 2011 Share Posted May 31, 2011 Good plan, wait for a rainy day and go through the wiring Link to comment Share on other sites More sharing options...
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