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Hi guys u have spent a few hours searching but most if the info I have come accross is for gtst and the like, anyway I have a 32 gtr with tbe, pods, and profec b, during tuning on the street u have never had this issue but at wsid this week on my second pass I noticed a miss developing then would clear at around 5500 rpm, third pass was worse so I didn't do anymore runs, on the way home I switched to low boost and it's fine but at high boost 14.3 psi it misses? Now aren't they supposed to run 14.7 with restrictor removed? It was very cold at wsid but seems strange to not have done it before, i hadn't heard of r & r before but during searching missire relates posts I came accross it and some people saying over 10psi can trigger it? I have removed coils and am replacing plugs with copper capped at .8 and replacing fuel pump and filter just in case but there are no visible issues with the coils and that brings me to another question in terms of taping or siliconing coils all the pics are of gtst coils so how do u do it on a gtr? Do I fill the gap around the coil an it's little metal frame with silicon or is there another way? Sorry to bring up such and old issue but believe me I have searched since Wednesday night in this issue,

Scott

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I am inclined to say coils,etc as R&R would probably not make it misfire... From what i can tell sometimes coils can look ok but still be starting to deteriorate.

Not sure if you have the ignitor separate from the coils, but that could also be a problem.

Sorry i cant help more.

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Hi mate, sounds like coils to me too. My 33 GTR was missing at higher boost when I hit around 5500RPM on the dyno. The dyno print out showed a fluctuating flat spot all the way till the boost came down.

I went with some new plugs and it was no different.

A set of yellow jack coils later, it will boost all the way up to 21PSI without a single hesitation.

It was suprising how much power it had up top and how harder it pulled.

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So here's another question after reading the coilpack thread I'm still not sure, should I buy yellow jackets at $390 or splitfire di at roughly $600? I don't mind spending the money if they are better but the two year warrantee from yj is appealing

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So I ended up getting splitfires for $570 regapped the copper plugs to 1.0mm changed the fuel pump and redid timing which was only 15degrees, feels smoother and there is no miss and on part throttle is less rough and doesn't pop anymore when I back off so hopefully that's problem solved , thanks guys for all the input much appreciated

Scott

zil13r

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