Domo Posted May 14, 2018 Report Share Posted May 14, 2018 My wife's 2000 v70xc died today on the highway everything was fine until it started to sputter and then lost power and wouldn't start again, I towed it home scanned it and got codes for antenna ring, immobilizer module and signal to low to all 5 coils, I changed the antenna ring tried to start it and it wouldn't start, all the codes went away except for the ecm-720a the car had no symptoms prior to this, it is a manual swapped m58 I have done most of the tests relating to this in this. I'm getting fuel at the rail and plugs smell of fuel but I don't think I'm getting spark because of the ecm-720a, any help would really be appreciated it hasn't been the best mother's day Link to comment Share on other sites More sharing options...
Ihatespeedbumps Posted May 15, 2018 Report Share Posted May 15, 2018 So does the engine crank but not start? Link to comment Share on other sites More sharing options...
Domo Posted May 21, 2018 Author Report Share Posted May 21, 2018 It turns out it it blew the fuse for the coils, I have replaced them, but the fault it back I have signal to low on all five coils. I don't even know where to start I'm assuming this is a wiring problem Link to comment Share on other sites More sharing options...
Ol' Dirty Noodle Posted May 25, 2018 Report Share Posted May 25, 2018 On 5/21/2018 at 7:20 PM, Domo said: It turns out it it blew the fuse for the coils, I have replaced them, but the fault it back I have signal to low on all five coils. I don't even know where to start I'm assuming this is a wiring problem If you’re blowing fuses then yes it’s electrical to an extent, the electrical load is clearly greater, the question is why? 1. you could have a line to line short, I.e two nicked power/signal wires crossing voltage 2. a line to ground short, one or more nicked wire contacting metal. 3. Something internally at fault in one or more of the coil packs causing the overload. i’d check The integrity of the ignition wiring harness very carefully and maybe swapping some known good coil packs in to start and go from there Link to comment Share on other sites More sharing options...
Domo Posted May 25, 2018 Author Report Share Posted May 25, 2018 I will be continuing to check wiring this weekend I have changed all coils and plugs and I have inspected the wiring from all the coils back to where it joins the harness above the trans Link to comment Share on other sites More sharing options...
Domo Posted June 1, 2018 Author Report Share Posted June 1, 2018 Just to help anyone else that has this issue I changed coils, plugs and inspected and re tapped all the wiring for the coils so far so good. no codes since last week Link to comment Share on other sites More sharing options...
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