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Discussion Starter · #1 ·
So I bought my 2014 focus st used with 37k on it. I now have just under 55k and all I did was muffler delete, turbosmart bpv, and 93 octane stratified tunes with crackles and pops, and green filter with lid off. I live in pa so right now we have cool weather. When I do a pull in 3rd or 4th gear start at about 2.5k or 3k rpm my car kind of bucks like it's going in and out of power. Does anyone know what it can be? It kind of feels like I'm losing traction in and out but then it doesn't. Does it sounds like transmission or clutch? Thanks for any help guys.


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So I bought my 2014 focus st used with 37k on it. I now have just under 55k and all I did was muffler delete, turbosmart bpv, and 93 octane stratified tunes with crackles and pops, and green filter with lid off. I live in pa so right now we have cool weather. When I do a pull in 3rd or 4th gear start at about 2.5k or 3k rpm my car kind of bucks like it's going in and out of power. Does anyone know what it can be? It kind of feels like I'm losing traction in and out but then it doesn't. Does it sounds like transmission or clutch? Thanks for any help guys.


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Any negative corrections? I know our fuel right now is complete garbage at most stations. (Also in PA)
 

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Discussion Starter · #4 ·
Any negative corrections? I know our fuel right now is complete garbage at most stations. (Also in PA)
Makes sense. I haven't done any data logs I'll try to get one today. Thanks for the response man.


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Makes sense. I haven't done any data logs I'll try to get one today. Thanks for the response man.


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Just yesterday in 4th doing a pull passing some people I noticed a little blip coupled with a -1.2 and -.8 correction on 2 cylinders and I backed off a little. Gotta love PA winter fuel. Hopefully that might be the case with you! I'd recommend a good top tier gas station in the meantime to see if that alleviates the issues.
 

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Are you doing your pulls with your traction and stability controls turned off?

I prefer using a 91 tune so I can run 93 in the winter...thanks winter blend.
 

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Are you doing your pulls with your traction and stability controls turned off?

I prefer using a 91 tune so I can run 93 in the winter...thanks winter blend.
If you have no issue spending the money to do this, it's a great alternative.
 

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No I need to though


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I second this. I had a similar problem and it turns out that the factory spark plugs weren't doing it anymore. If you still have the factory spark plugs when you look, do yourself a favor and pick up four Denso ITV22 spark plugs off of Amazon or an autoparts store that carries them. They're about $7 each and they're well worth the price. Just make sure that you check the gapping of them before putting them in.
 

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If you have no issue spending the money to do this, it's a great alternative.
The 91 I get is ethanol free and it's the same price as 93 at the other stations around me. There's a gas station about 50 miles from me that sells E0 91 for an entire $1/gallon more than 89...and it's Kwik Fill.
 
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The 91 I get is ethanol free and it's the same price as 93 at the other stations around me. There's a gas station about 50 miles from me that sells E0 91 for an entire $1/gallon more than 89...and it's Kwik Fill.
Wow. So you dished money for a new tune AND the gas you use with it LOL
 

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The 91 I get is ethanol free and it's the same price as 93 at the other stations around me. There's a gas station about 50 miles from me that sells E0 91 for an entire $1/gallon more than 89...and it's Kwik Fill.
Wow. So you dished money for a new tune AND the gas you use with it LOL
I don't understand what you're saying. E0 91 by my house is the same price as 93 by my house. The difference between a fill up of 87 vs 93 is about $4 here. I didn't get a new tune to run 93. I'm running 93 winter blend on a 91 tune.
 

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Discussion Starter · #13 ·
Alright guys I put 93 from a reputable gas station my pulls seem more solid it did it ever so slightly lol. Just filled up though I'm going to wait a bit and do another pull on the way home see how she is. Thanks for everyone's help.


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Alright guys I put 93 from a reputable gas station my pulls seem more solid it did it ever so slightly lol. Just filled up though I'm going to wait a bit and do another pull on the way home see how she is. Thanks for everyone's help.


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Make sure you check your spark plug gaps too. It's imperative. Gap them to .028".
 
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I don't understand what you're saying. E0 91 by my house is the same price as 93 by my house. The difference between a fill up of 87 vs 93 is about $4 here. I didn't get a new tune to run 93. I'm running 93 winter blend on a 91 tune.
I misread and thought you meant the e0 91 is a dollar more and I thought you were dishing out a lot of money to run the more expensive fuel. I see not you said it is the same price as 93 so your price didn't change. The only extra money you have to spend in your case is the cost of a 2nd tune (91 octane). If I were okay with buying a second tune I'd consider doing this as well and only run my 93 tune when it's warmer.
 

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Discussion Starter · #16 ·
Turns out it was spark plugs. Car has almost 57k and I'm pretty sure it was factory plugs. Anyway I threw in the 1 step colder ngk plugs and cars runs and pulls like a dream.


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