problems at 5K RPM with new SOS Coil Packs - Mustang Evolution

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Old 05-07-2016, 01:52 PM   #1
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problems at 5K RPM with new SOS Coil Packs

I just installed the new coil packs. Idles way smoother. seems to have good/slightly better geddy up. Only one problem... I hit about 4500-5000 rpm and starts sputtering like its a two step or something. I do have a paxton SC and rest of mods in sig. Any thoughts? Here is a couple please let me know what you think.

1. They have you gap plugs to .055 when adding the new coils. Maybe that gap is too big and blower is killing the spark. 4500 is about when the boost really kicks in hardest.

2. I have a JMS fuel pump booster and haven't ever really adjusted since it was installed with Paxton. Maybe not enough fuel and thats issue? One thing about this theory is that I was lagging prior to coil install occasionally right when shifting into gear (manual) at WOT
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Old 05-07-2016, 03:16 PM   #2
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WAY too big on a blower car. Bring it back down to .035 max. Doesn't matter what they say, that's just bull**** thinking you can jump that with cylinder pressure that high.

Don't adjust the booster, just run it max voltage all the time. That's actually best practice.
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Old 05-07-2016, 05:06 PM   #3
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thanks man. I assumed that was the issue. I emailed Lund... they responded same day on a saturday to help me. He said to go to stock. all aftermarket are worthless and often more harm than good. just did and regapped to .028. Test drove and perfect. scre it just going to send them back
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Old 05-07-2016, 10:20 PM   #4
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Yeah my lightning did that when I went to 16psi. Had to change my plugs and go with a smaller gap. I just took it to swanson performance and had them do it with the new tune. But it acted like it had a 2 step when I got into boost. Sometimes a certain brand of plugs will do that too.
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Old 05-09-2016, 12:23 PM   #5
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Stock coil packs are better than most of the aftermarket ones. Fix your gap first, if you still have problems get some stock coil packs.
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Old 05-09-2016, 02:57 PM   #6
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I got Accel's super coil pack and they been doing me good.
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