miss at idle

[Riptide]

I have a 2014 tvs car that has what feels like a slight miss at idle. It is intermittent but if the car sits at a light for a while I usually feel it. It is a pretty subtle just a light jolt or shudder. You can't hear it and the car accelerates and runs fine both in and out of WOT.

I haven't taken it up with the tuner yet just looking for opinions. Plugs were gapped to .032 and are Brisk RR12S.

I had a set of Brisk on my Kenne Belle 3v car and always had a slight miss with it too. Brisk had an awful reputation on those cars but seems like not so much with the coyote.

Wonder if it is worth trying NGK 6510 or if I'm worrying about nothing here. TIA

 

[Blazer707@TBR]

The brisk plugs work awesome on these cars, we run them on a TON of cars and so do other shops.

 

[Riptide]

Is an occasional miss at idle likely to damage anything?

Is .032 too tight for 9psi? Could a plug that isn't gapped the same as the others cause this condition?

 

[SHIFTYBUSINESS]

Mine does it also. I just put the vmp stage 2 85mm on, I also changed to the ngk plugs when I did the install. I'm still on the base tune and I'm waiting for Justin at VMP to get back to me on my logs so will see what he says. It's just like you described with the slight shutter.

 

[Riptide]

So a friend of mine with a paxton also has the same slight miss at idle. So I think I can rule out plugs because you have the NGK and he has a completely different system yet it does it there also.

I'm guessing it's normal.

 

[FocusSTGuy]

So a friend of mine with a paxton also has the same slight miss at idle. So I think I can rule out plugs because you have the NGK and he has a completely different system yet it does it there also.

I'm guessing it's normal.

My car does this stock....never noticed until I put the exhaust on and paid more attention to it.

 

[Bullitt 3309]

I wonder if this is the "waste" spark that ford did on the 2001 cars for emissions...

 

[CPRsm]

idk if these cars have wasted spark. But this seems pretty normal as long as the miss is very small. As in "what was that? Was that a miss?!" They seem to have an ever so slight miss every once in a while it seems. Some more pronounced than others. Honestly I think the ECU is doing it for system checks. Testing for misfiring detection, checking to make sure tdc is on the right tooth, etc.
if you barely notice it, or is not every revolution riptide, I wouldn't sweat it

 

[Cobra 2997]

Mine has a slight miss at idle as well....14 GT w/ Roush/TVS. I had a Boss 302 (NA), that occasionally did it as well.....I think it's just a characteristic of the VCT ?

 

[03MUSCLE]

My wifes 13 GT dose it too. Hers is Pro-Cal tuned only

 

[Tgpatrsn]

Slight miss at idle here too. Always done it

 

[R.D.P.]

I think most exhaust\tuned cars do this. I wouldn't sweat it unless I had a bone stock 5.0, then it would probably bug me.