BillyM247 Posted August 10, 2015 Share Posted August 10, 2015 So, about a week ago, my car developed a misfire only on boost just after 6k revs, was only in 3rd at that point but now it's in every gear. It's not fuel cut as I have a JAM ecu. It feels exactly like fuel cut, but it's not.I have cleaned the coil/igniter connectors and made sure it has a nice contact with the Bulk head.Tried different leads, cleaned rotor arm & dizzy cap even though they and the leads was new a few months ago.Not tried new plugs get, not done anything with the plugs.What could this be? My cars spec is bellow if neededSpeed vision gen2 hybrid ct9 @1.2 barJam ecuMagnacore 8.5 leadsSide exit exhaustFMICIridium plugs heat range 6 *i think*Walbro fuel pumpAthena 1.2 metal head gasketPlease note it did this even at .8 bar with standard ecu.Going to re-check timing tomorrow and replace the plugs hopefully.Thanks people Quote Link to post Share on other sites
Stu Posted August 11, 2015 Share Posted August 11, 2015 Swap the plugs out for normal ones and go to a 7 heat range for that boost. Something like BKR7ES. Then gap to 0.75-0.8mm for starters. They're cheap plugs and much more forgiving to over fueling that iridiums. Quote Link to post Share on other sites
BillyM247 Posted August 11, 2015 Author Share Posted August 11, 2015 Thanks stu, I'll give that a whirl! Quote Link to post Share on other sites
turbo-fever Posted August 30, 2015 Share Posted August 30, 2015 Did this get solved ? Quote Link to post Share on other sites
BillyM247 Posted September 17, 2015 Author Share Posted September 17, 2015 Was map sensor! Was map sensor! Quote Link to post Share on other sites
turbo-fever Posted October 3, 2015 Share Posted October 3, 2015 Having the same problem, hopefully this will sort mine aswell cheers pal Quote Link to post Share on other sites
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