mattycee New Member 11 Member For: 6y 2m 9d Gender: Male Location: Sydney Posted 25/10/18 07:27 AM Share Posted 25/10/18 07:27 AM Hey all, long time reader first time poster. My 2011 mk1 fg xr6t has been modified and tuned. A week after the tune it started running sh*t and threw code P1358. We checked the coils, swapped them around etc and each coil works fine. The pcm stopped sending signal to the coil for cylinder 5 though. Got a new computer and car is at ford now for keys to be married to new ecu and them tune to be uploaded into new ecu. Does anyone know why the pcm can sh*t itself like that and what can be done to prevent it from happening again? Nobody can give me answers, seen it happen to another xr6t at the same time from another tuner. Thanks in advance Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,093 Member For: 16y 8m 24d Gender: Male Location: Melbourne Posted 25/10/18 10:19 AM Share Posted 25/10/18 10:19 AM A short in the coil driver circuitry can cause a coil driver to fail. Link to comment Share on other sites More sharing options...
mattycee New Member 11 Member For: 6y 2m 9d Gender: Male Location: Sydney Posted 25/10/18 11:15 AM Author Share Posted 25/10/18 11:15 AM That's what we put it down to k31th. Is there anything that can be done th prevent it happening again? Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,093 Member For: 16y 8m 24d Gender: Male Location: Melbourne Posted 25/10/18 11:35 AM Share Posted 25/10/18 11:35 AM Get an entirely new loom put in place for that section that caused an issue. Replace all of the parts in the pipeline of potential failure, basically, is how I'd attack it. 2 Link to comment Share on other sites More sharing options...
mattycee New Member 11 Member For: 6y 2m 9d Gender: Male Location: Sydney Posted 25/10/18 06:54 PM Author Share Posted 25/10/18 06:54 PM Already on it, thanks mate ? will report back once finished Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,093 Member For: 16y 8m 24d Gender: Male Location: Melbourne Posted 25/10/18 09:33 PM Share Posted 25/10/18 09:33 PM Sounds good, mate Link to comment Share on other sites More sharing options...
mattycee New Member 11 Member For: 6y 2m 9d Gender: Male Location: Sydney Posted 26/10/18 07:50 PM Author Share Posted 26/10/18 07:50 PM Update: got the components replace, car towed to tuner and my tune uploaded, car is now not boosting and has an engine light. Running more tests this arvo after work, fixing them and putting it on the dyno again Link to comment Share on other sites More sharing options...
mattycee New Member 11 Member For: 6y 2m 9d Gender: Male Location: Sydney Posted 29/10/18 11:51 PM Author Share Posted 29/10/18 11:51 PM Update 2: now missing again in the same coil. this is with harness, coils and ecu replaced. my tuner is an LS specialist (several 1000+hp street cars including his own) but he has only done around 15 xr6t's and f6's combined. Neither my tuner or myself are sure if there could be any weird settings that need to be adjusted in tune. everything looked good from timing to a/f ratio as well as torque settings. not name shaming and wish to stay loyal to my tuner as he's trying his best. my car and another fg are the only 2 with the issue and were both worked on days apart. same parts used etc the research and problem solving continues.. Link to comment Share on other sites More sharing options...
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