stephenhunter205gmail.com Posted August 3, 2017 Share Posted August 3, 2017 Hi, on the last track outing my R500 started spluttering at just over 6000rpm. I have changed the plugs and just tried it on the road and no improvementThe track day was in S Ireland (no super for sale) and I had to run ordinary unleaded. Would fuel be the issue? Car perfectly normal and is 100% up to 6000 rpm. Any thoughts appreciatedAlso, still has the original pipercross air filter. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 3, 2017 Member Share Posted August 3, 2017 ... ordinary unleaded...Can you remember the RON? (I don't know what's available in the Republic of Ireland.)Was any of that petrol still present when you tested it after changing the plugs?Jonathan Link to comment Share on other sites More sharing options...
stephenhunter205gmail.com Posted August 3, 2017 Author Share Posted August 3, 2017 Hi Jonathan, yes I have still have 26 litres of 95 Ron in the car. Link to comment Share on other sites More sharing options...
Paul Deslandes Posted August 3, 2017 Share Posted August 3, 2017 Check your air filter, especially if you have one integral to an elephant's trunk that picks up air from road level below the grill as they get filled with all manner of carp. I saw an R500 engine where the owner had spent a fortune on two rebuilds when all they had to do was change the air filter.Otherwise check fuel filter/fuel pressure as it's quite likely to be fuel starvation.Otherwise crank sensor, coil, HT leads. Link to comment Share on other sites More sharing options...
revilla Posted August 3, 2017 Share Posted August 3, 2017 No idea how relevant this is to a Duratec buy on a K Series the ECU limits the RPM to various round number multiples of 500rpm under various fault conditions, typically sensor failures. If it feels like it is rev limited to 6000rpm it could well be that the ECU is in some kind of limited operation / limp mode. Worth running a diagnostic scan to see if the ECU is trying to tell you something? Link to comment Share on other sites More sharing options...
vertew Posted August 5, 2017 Share Posted August 5, 2017 As revilla indicates ...As someone who is also enjoying some misfire issues (engine 'cough' thread) - can I suggest that it's worth getting hold of the SBD CAN dongle and easimap software if you haven't already got it. Install on a laptop, then do a road test to capture info on the problem while it's happening.I've not got the bottom of my issue yet, but this kit has helped and will probably prove to be a good investment as other problems come and go. Link to comment Share on other sites More sharing options...
stephenhunter205gmail.com Posted August 6, 2017 Author Share Posted August 6, 2017 Thanks guys and taking advice from last post as the issue is actually getting worse with new tank of super so there is a problem somewhere. Link to comment Share on other sites More sharing options...
Frosty Posted October 28, 2017 Share Posted October 28, 2017 Hey Steve,Did you get to the bottom of this? It felt like my R500 Duratec was intermittently doing the same thing today. Link to comment Share on other sites More sharing options...
Frosty Posted October 28, 2017 Share Posted October 28, 2017 Hey Steve,Did you get to the bottom of this? It felt like my R500 Duratec was intermittently doing the same thing today. Link to comment Share on other sites More sharing options...
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