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Fault code P1358


mattycee

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  • Member For: 5y 5m 3d
  • Gender: Male
  • Location: Sydney

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

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  • less WHY; more WOT
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  • Member For: 15y 11m 18d
  • Gender: Male
  • Location: Melbourne

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.

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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

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  • Member For: 5y 5m 3d
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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..

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