There are alot of issues with "professional tuners" and if they even know what they are doing. here's a posted example.......

Posted August 26, 2012
Bad situation-Need help! - Vintage Mustang Forums
To make an extremely long story short. I need someone to tell me who to talk to for help. I have posted several times and got a lot of help. Got my engine build finished in May. Ran great. Took it to Roush Racing for a tune. It is a 93, efi, 302 with several upgrades. Went to get it from Roush and the water hose had blown and torn up my brand new hood I just had painted. It can be fixed. Drove the car home and it would not start the next day. Finally found the adapter between the TPS and painless harness was missing. Fixed that. It would not idle consistently. Took it back to Roush. They said it was fixed. Went less than 1/2 mile and it was idling at 2500 rpm. Took it back. They were lost. Said to bring it back. Never did since I had no confidence in them. The head of the dyno room called someone else for advice. Took it to a friend who restores cars. He went back through all the wiring (Painless), changed IAC, changed to stock computer, and ran diagnostics. Never could get to idle consitently. Still between 1800 and 2500. Read the forums and found Pro Dyno in Rock Hill, SC to be one of the best. It has been there for 6 weeks now. Changed computers again, IAC, and TPS. Added FPA headers and Magnaflow 2 1/2 exhaust and retuned. Pulled over 300 rwhp, 330 torque and they told me to come and get it. I drove it around the block and it ran great. Was going to get gas across the street and it went crazy again. Then it would not start until I bled the fuel rail. It is still there and they are lost. Only suggestion is to start changing parts which are all new. It is now grounded to the frame=twice, battery, and body twice so it is not the ground. It could be coincidence but I have not been able to drive it anywhere since I took it to Roush in May. Pro Dyno is supposed to be the best and they are baffled. Only way they could get it to idle correctly was to disconnect IAC. I need help. I am totally disgusted. If you need to talk, PM me and I will give you all my personal contact info. Thanks for any help. I am out of options.

There have been many instances where the buyer has looked at the bought canned or custom tune program & ops data and found the Air/Fuel ratios to be only modified at certain points resulting in severly overrich & overly lean mixtures throughout the rpm band.....this without doubt leads to increased wear/component damage and absolute voiding of any oem warranty.

While many will claim the opposite or that there is no way the oem can tell, i can assure you every OEM can at the dealer level determine & see exactly what has been done by pulling the Mode 9 file on the IDS.

Absolutely no one without direct data link to your vehicle can safely, effectively or otherwise "tune" your vehicle remotely........basically, this is nothing more than PR material for anyone to make such a claim about their ability to do so...and because they are not performing actual automotive repairs, they do not have to comply nor is enforcement available for them as it is for any conventional repair shop in the US.

Never take anything for face value and secondly, if you live near any major city there are excellent tuning specialists with dynos who for the same price (if not less) will tune your vehicle taking into consideration your specific needs including environmental conditions, for your specific vehicle, 3rd, If you are comfortable and understand how to tune a vehicle, you can also do this yourself as there are software programs available, that “Speak Common English” that will allow you to tune your vehicle. One company is HP Tuners, they offer a program which is specific to the home mechanic.....this version limits the span of adjustments as a safeguard against doing something outside of the oem scope……basically, keeps you from doing something “too stupid by accident” (grin).

 

Just curious if you or any of the others with issues have contacted their SCT dealer to remedy the issues. I had an idle problem and codes when I first installed my SCT. I contacted the dealer and he walked me through it and I found problems with my truck that I was unaware of until the tunes demanded more from the engine. After replacing my COPs and PCV hose, she runs awesome!

 

yes i did and i was first told to update the tuner which i did and it helped with a few small glitched i had when i tried to adjust the WOT. Still have the idle issue once in a while and i still feel 100% that the tune is weaker then the stock computer. Was told the tune i had was more powerful and its just in my head but my a$$ tells me otherwise

 

Ha Ha! That is hard to ignore.

 

...just purchased the superchips cortex 1950 to tune my 2003 5.4L Expedition; loaded the 87 Octane tune; immediately noticed a difference in performance only driving it 35 miles to airport. Seems Superchips figures whoever buy these things know exactly how to use each and every feature, because they didn’t put any effort into their (so called) manual, which is almost useless! I'm mechanically inclined, but vehicle programming is new to me, hopefully I can learn from members of this forum and Superchips...<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
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i removed my SCT a week after i "updated" it and installed my old 1714 Superchip and im still loving it! Getter wwaayy more power by my a$$ reader and havent had one issue with the Superchip 87 tune

 

Hello, I eventually want to re-gear my truck, but I want a good tuner too

 

Who did your tunes?