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But now I have to leave you for the Mustang GT owner's web site. Thanks go out to JAY KIM for motivating me to finally buy a car again that I can enjoy without being at the mercy of unscrupulous tuners who wont respond to my problems. The goddamn backfire is now someone else's problem. My 2017 Mustang GT is so sweet but not a true sports car but I owned an 88GT that put out 600 hp. I can't wait to go to the goody list that is so plentiful for Mustang owners. First I'll get an engine brace, then a cold air kit and some magna flow exhausts. Then I will go to the tuner DOWN THE STREET FROM ME and get a flash for the mods and not worry about backfires or limp modes that I had with SFR!

So thank you again Jay

SEE YA!
 

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Couple things, "aggressive" tunes wont cause the issues you have.

You took a modded car to a dealership for diagnosing, of course they're gonna blame everything on mods, they're stupid. I still doubt you swapped the tuned ecu with a stock ecu to verify the tune/ecu was causing the issue. You made multiple threads and people tried to help you each time but you continually ignored it and instead kept placing the blame on Jay. I mean honestly, its a ****ing canned tune dude, and you said you had S1 so its not even aggressive, the file on your ecu is likely the same tune file on 200 other BK1 3.8's, so if you were having issues, its something else. You've asked Jay to "turn down the aggressiveness"; wtf do you want Jay to do with a S1 tune to make it less "aggressive"? Anything less than S1 is called stock.

You then tried to fix it by swapping cam sensors, which, you say fixed it for 7k miles then came back. Uhh, thats called "misdiagnosis". And guess what, if the ECU was causing it, it would've happened again by 0.7 miles, not 7,000 of them. Typically if there is something wrong with how an ECU senses and reacts to a condition, it finds its same issue within a few miles. If this got you 7k until your issue came back, you were on the right track but the wrong part.

I bet the next owner has it fixed in a week after he swaps out/regaps plugs and/or finds his dead coil, or intake leak, or the 20 other things that could be causing it before the tune could.

Based on your posts, I know you don't have a 600hp 88 foxbody. Someone who has to ask if the dealer should perform the injector cleaning service and that continually places blame for a simple misfire on the tune doesn't have the where-with-all or patience to build a 600hp anything. Whatever happened to your awesome BC Stroker Kit and going turbo? C'mon, someone that gets this butthurt about a simple misfire and quits, doesn't have or didn't have the ability to make a 600hp car. My 03 Cobra had 450hp/tq through a pulley swap & tune setup and there were days I wish a misfire was the least of my worries.

Which leads me to my next, if you are one of those guys that pays shops and dealers for work, good ****ing luck not getting hosed with that Mustang. I don't know how many local mustang guys I've meet in my days as a mustang owner who have all their **** done at some shop, and then you drive it and its a complete janky POS, hanging throttle, spiky powerband, ultra-lean AFR because the shop is using your wallet for their HP advertisement, so they can claim they make 10hp peak more than the next guy and good luck to you when your #8 piston melts at 145mph in 5th gear because they tuned it actually super aggressive. Are you going to be there to tell said tuner you only want xx* of max timing at WOT and 11.5:1 AFR max? Or just let him do "his thing"?

Crazy to me, you will hate on Jay who is one of two outfits in the world that tunes these cars, and has probably tuned over 1000+ gen coupes (half of those probably in person), but you'll trust Fred at "Fast Mustangs R Us" down the street from you that might be on his 10th S550 GT? Good ****ing luck with that.
 

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Bye..... Stay well away from crowded places in that stang.
 
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But now I have to leave you for the Mustang GT owner's web site. Thanks go out to JAY KIM for motivating me to finally buy a car again that I can enjoy without being at the mercy of unscrupulous tuners who wont respond to my problems. The goddamn backfire is now someone else's problem. My 2017 Mustang GT is so sweet but not a true sports car but I owned an 88GT that put out 600 hp. I can't wait to go to the goody list that is so plentiful for Mustang owners. First I'll get an engine brace, then a cold air kit and some magna flow exhausts. Then I will go to the tuner DOWN THE STREET FROM ME and get a flash for the mods and not worry about backfires or limp modes that I had with SFR!
Lol... A few weeks before I bought my 2016 R-Spec, I took home a 2017 GT Sport package. I was so amped to finally get that Aston Martin-looking rocket ship I couldn't wait to mod it. I'd been a member on a couple of Mustang forums for a while, so I started with the questions and the research, planning out what I was going to do first, then second... then 27th, etc.

Two days later I brought the car back. Why? BOOOOOORRRIING! No road feel, numb steering, no sense of acceleration even though the thing was screaming fast. Positively zero handling. I was taking turns 20mph faster in my 2013 R-Spec than I could take them in the GT. I've owned and driven more powerful cars than the Mustang, so its not like I'm a rookie at this stuff. The exhaust note is lame, the seats are fat and shapeless, and the stereo is garbage.

The next month, I found a Hondooey dealer who had the last of the R-Specs on his lot. I got out of my 2.0T R, got in the 3.8, and before I made it two miles I decided I had to have the car. Compared to the Mustang, the Gen Coupe is an acrobat. The R-Spec seats are better than seats in cars costing twice as much. The engine/exhaust note is sex, compared to the muted farts coming out of the Mustang. And at almost $10k less than the GT Sport, my Genesis was a steal.

Crazy to me, you will hate on Jay who is one of two outfits in the world that tunes these cars, and has probably tuned over 1000+ gen coupes (half of those probably in person), but you'll trust Fred at "Fast Mustangs R Us" down the street from you that might be on his 10th S550 GT? Good ****ing luck with that.
I'll second that.

Every single Ford shop around his home town has a reputation ranging from "meh" to "run away and don't look back". In fact, most of the performance shops there are less than stellar. I got out of there years ago but I stay in touch.
 

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Although I have a love/hate relationship with Jay as well, my tune itself was reliable and fun. And yeah, mustangs are cloned pigs everywhere down in Florida. I sold my Genny to my parents, put all the HP/TQ and sound back to stock and they love it. I still get to drive it sometimes, and miss it. It is a really well designed vehicle, minus the NAV.
 

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I said it in the other thread and I'll say again here. A canned tune is "one size fits all" computer file. It is the same one everyone gets unless you go stage 1 or 1.5 which again, copy/pasted files. So if your issue was tune related, which it wasn't, then everyone before/after you would have the same thing going wrong. Funny how my stage 1 was installed a month after I purchased the car and for almost 4 years now, not a single hiccup. Did you try a stock ecu from someone else and see if the problem exists at least? Doubtful and meaningless at this point. The dealership will prob swap one back in, diagnose properly, and fix the underlying issue which should have been done in the first place.
 
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