Advice for responding to bad news from my tuner
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Advice for responding to bad news from my tuner

This is a discussion on Advice for responding to bad news from my tuner within the Focus RS Performance forums, part of the Focus RS Garage category; I dropped my '16 RS off at a tuner shop on Tuesday morning. My current mods are a Cobb AP running a stage 1 93 ...

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Thread: Advice for responding to bad news from my tuner

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    Advice for responding to bad news from my tuner

    I dropped my '16 RS off at a tuner shop on Tuesday morning. My current mods are a Cobb AP running a stage 1 93 octane OTS, a Cobb RMM, Cobb air filter, and a Mountune V3 CBE.

    I was having the following installed: ETS FMIC, Cobb intake, Turbosmart BOV, WGA, and NGK Iridium plugs. I was also having a pro tune performed on a DynaPack dyno.

    I was told the installs all went well. However, I got an email saying that misfires were encountered on the dyno. They said they got good power during the first pull but once things got hotter it started misfiring. They tried again on the stock plugs, and with different gappings but the misfires continued.

    The tuner and dyno are affiliated but managed separately. The tuner sent an invoice along with the 'bad news' email for $650. He said they would try taking it out on the road for a test drive tomorrow morning and get back to me.

    First, is there anything I can suggest the tuner check? The car has been flawless on the Cobb OTS tune for 8 months without a single issue. Second, how should I position my reply and what realistic expectations should I have from a service perspective?


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    Not an expert by any stretch however misfires would be indicative of a few possible issues including bad fuel, lean AFR and /or ignition timing advanced too far. In short I think they have screwed up your tune and I would recommend you flash the appropriate Cobb OTS tune until you can sort out the issue.

    If you have ongoing issues with high charged air temps you might want to consider water meth injection or ethanol to enable a decent tuner to bring your timing forward safely and reliably.


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    More seriously I would confirm that the WG install has been done correctly and you are not overboosting. That could explain the overheating and detonation. I would get that confirmed ASAP as overboost will kill an engine real quick.


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    the first thing i'd tell them to do is revert back to oem 'stage 0' tune and do some dyno pull and see if its still misfiring. if it goes away that should rule out hardware.
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    At this point I really don't have any additional information beyond what I included in my OP. I had requested a baseline run but by that time the new mods had already been installed. So I suspect the misfires were observed with the Cobb tune I dropped it off with, but I've requested confirmation. If they had already tuned anything I can request they revert and try another run. As for fuel, I'm running 94 (Petro Canada ftw!). I also don't know what they are looking for taking it out on the road for a test drive. I've asked if it runs well if they intend on putting it back on the dyno or just giving it back...

    Sorry--this is more venting than anything. Been looking forward to this for moths and now I'm anxious and extremely frustrated.

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    Mate, seriously I would NOT be letting them road run the car until you have another tuner provide you some advice. If you have the logs from the dyno pulls I would be looking at a Cobb protuner or etuner to review and provide advice.


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    It seems these RS's are very susceptible to heat. I've seen a couple videos of tuners talking about cooling issues and how the RS responds to getting hot.




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    He has an upgraded WGA so flashing back to stage 0 would be bad unless the boost control maps are tuned

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    Quote Originally Posted by mt057 View Post
    He has an upgraded WGA so flashing back to stage 0 would be bad unless the boost control maps are tuned
    What's your recommendation? Is the care safe for gentle highway driving? The tuner is 100km away and I've been driving a rental. Should I request the car back and go with remote tuning from someone more qualified?

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    Quote Originally Posted by ariens.ca View Post
    What's your recommendation? Is the care safe for gentle highway driving? The tuner is 100km away and I've been driving a rental. Should I request the car back and go with remote tuning from someone more qualified?

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    I would request a WG safe tune and get it home staying off boost. Would also contact someone like Alex from Stratefied or Adam from Tune+ and ask some advice.


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