1. Equilibrium Tuning

    1. Equilibrium Tuning

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    Fairfield, CA

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    Equilibrium Tuning

    4.6 (88 reviews)
    Open 8:00 am - 5:00 pm

    Services - Equilibrium Tuning

    Auto brake repair

    Auto engine repair

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    Recommended Reviews - Equilibrium Tuning

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    Dyno Results
    Mike P.

    Updated Review: Car has been running great still on flex fuel. Drove about 10k miles from 50K and no problems at all. Over 400awhp STI stock block and clutch no problems whatsoever. Ed's great at what he does and Patrick is a great help as well. Ed still replies to my emails and helps out with any questions or problems I have. Just be patient, I'm sure he has hundreds of emails on top of the amount of cars he needs to tune. EQ has one of the best services I've had from a tuner. They'll take care of you no problem.

    2006 forester xt.  Vf48, inntercooler, fuel pump and boost controller done by equilibrium
    Mark A.

    I don't regret coming here. First thing I have to say is customer service is on point. Patrick the service advisor is the man! I send him a email and he gets back to me ASAP. He also explains things so I know exactly what's going on. He keeps me up to date on anything that is going on with my car. The mechanic that worked on my car (I forget his name but he's the shorter guy) is a good dude. Helps me out and just like Patrick he lets me know what's going on. Just got a 2006 forester that I was having problems with and I was looking for a shop that does a lot of work on Subarus. Not just Subarus but working on modified vehicles. They were able to check out my vehicle and give me a honest diagnosis. With my work schedule I can only pick up my car at a certain time but they are always able to let me keep my car overnight. If they can't they will schedule me so they have space in the shop. I have my forester going in for sti conversion and Patrick was able to source the parts and set me up for a date to get them installed and have the car tuned. A check engine light just popped and I called him and he said he'll be able to take care of when I bring in the forester for the conversion. First day I came to EQ I was impressed by the sheer amount of Subarus and GTRs that they work on. It gives me confidence that they know what they are doing. I'd recommend this shop to anyone with a Subaru or modified vehicle because they know what's going on. Give Patrick a call and he'll definitely give you a honest answer and figure something out for you

    Michael B.

    For the past 2 months I had been kind of in a slump with my car. I'd had the car for 2 years, 2 E-Tunes from COBB, and one from FFTEC, stuck with top-tier parts and unapologetically paid for, what I thought was, equally exceptional workmanship. As far as the car had came, I couldnt help but having moments when the car just -felt- faster; made you laugh and scared you at the same time. The car just couldn't seem to replicate that anymore, even under what was considered perfect conditions; TOYOS, E85, rolling launch. It just wasnt happening. Few guys at car meets mentioned Ed, but I wasn't convinced that it was the tune. 6 months goes by, and a good friend of mine gets his 2010 back from EQ and he was incredibly happy...and he was on 91. After my Nissan dealership, had good things to say about Ed...I had to give it a shot. Having thrown the car on the dyno before, things were already different here; he tried to make sense of what my concerns were, what my goals were, and wanted to make sure keep in mind when he was tuning it. 2 days later, the car absolutely rips on E85. The car is incredibly energetic under load, and even more so around town. It's very clear the car is making full use of all the supporting mods, and easily pushing the tires to their limits. Not sure how these other shops could have missed the mark, but I couldn't be happier with how this turned out. Only regret is not coming here from the beginning...

    Thanks to Ed, Patrick, and Tom for a terrific job installing this Jackson Racing supercharger on my FRS.
    Alejandro F.

    EQTuning all the way. I drove 2 hours from San Jose to get a supercharger installed on my Scion FRS, and their reputation, experience, and service made me a happy customer. I met Patrick at the GT86 Summer Kickoff meet in Livermore, CA and already knew that I wanted to go forced induction. We spent a while on email talking about several kits, and I finally decided on the Jackson Racing supercharger (CARB legal), oil cooler, and Koyo radiator. I then sent them a check for parts, and a couple of weeks later the SC came in. They did a pretty good job of keeping me in the loop, and I was anxiously waiting to schedule an installation. I showed up on their door on Monday at 9 am, they offered to give me a ride to my rental car, and I showed up on Tuesday at 4 pm to pick it up. Tom, the tech, seemed very attentive to detail and gave me a run down of the new parts. Now comes the good part; if you drive a GT86, you know it is in desperate need of more power, it's missing that oomph in the mid-rpm range that makes it seem like a scrawny teenager instead of a drifting Bruce Lee doing round-house kicks on every corner and then accelerating away giving you a smirk in the process. Why did I choose Jackson Racing? Frankly, I wanted a reliable company and a CARB legal kit so I wouldn't have to worry about inspection. Why EQTuning in Fairfield? These guys are pros, and after spending so much money on it, I have the peace of mind that they did an excellent job, and if I need to come back for a tune, they'll take care of me. Ed, the shop owner, races his own GT86, and their shop is filled with GTRs, WRXs, and the sort, so they know their customers. If you have any questions, feel free to PM me. Happy boosting, Alejandro

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    11 years ago

    Now my baby is on E85 with a spectacular tune by Ed. I am so stoked. My car is a rocket!!!

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    Page 1 of 3

    Ask the Community - Equilibrium Tuning

    Do you guys do pre purchase inspections at all?

    No, unfortunately we don't. Sorry about that.

    Are you guys just a tuning shop or also have a machine shop Because I'm looking to Rebuild a Honda H22A4 motor?

    Good afternoon. Unfortunately we don't do engine builds or machine work on Honda engines here. I… 

    Can u dyno tune my 06 charger rt just installed stage 2 cam and really need tune to get max power from car?

    Hi Casey, This is something we can do. Please give us a call or shoot us an email for pricing and… 

    Do you work on 93-98 Supra 2JZTE motors?

    Hey Richard, What work specifically are you needing? We can do general maintenance and most aftermarket installations.

    Wondering if youTune 2012 Hyundai Genesis5.0 R-Spec?

    Hi there. Unfortunately we cannot tune your Hyundai. We do not have any software available to us.… 

    I have a 2009 AWD Lincoln MKS that I'm researching and would like to turbocharge. Would this be a good place to have do the work if I provide a kit?

    Hi. Sorry but we don’t have any experience with this platform.

    View All 12 Questions

    Review Highlights - Equilibrium Tuning

    The tune that Ed input into my car was beyond good, my mpg went up by 4 mpg and my powerband is definitely smooth/faster.

    Mentioned in 55 reviews

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    FactorySpecific

    FactorySpecific

    4.9
    (182 reviews)

    My Auto Guardian Angels!!! Been coming here for well over…read more15+ years for fantastic service for my older 2003 Acura before selling it, and now my 2017 Hyundai Santa Fe on everything from simple oil changes & windshield wipers to breaks, struts, alternator, timing belts, water pump, transmission issues, etc. What really locked me in is when talking to the owner Khoi he made a point on telling me they have a special point of looking out for women, single mom's etc. because he knows in this industry, they're often easy targets for mechanics who prey on women. Totally admired him for that. I know the whole team Gene, Khoi, Andy, & TJ (has changed a bit over the years), but still same great service. I should have posted about them well over a decade ago, but after having my car serviced yesterday (12/29/25), TJ & I talked about an issue he specifically helped me with last year when I was in a battle with Hyundai Dealership staying compliant on fixing a "Rod Bearing Failure" recall issue that requires an entire replacement engine install due to my car was experiencing serious stalling, slowing down in the freeway, and drastic oil burning out to the tune of needing oil fills every 2-weeks!!! One of the Hyundai Service Specialist advised I NOT refill the oil and just let it burn out until the engine locked or a specific service light switched on. I told her that sound awfully drastic and dangerous, but she said that would be the fastest way for them to get the proper engine "Rod Bearing Failure" code reading they needed to warrant the engine replacement. Needless to say, no oil caused the catalytic converter to blow out. Now, the Hyundai Specialist comes to me singing a new tune that it's now MY responsibility to pay $4500 for the Catalytic Converter to be replaced NOT addressing the new engine at all. I immediately hopped on the phone and followed up with TJ at Factory Specific, not only did he fully consult & educate me on the EXACT steps to take to make them address and fix ALL issues including the Catalytic Converter but that I could take it up with Hyundai Corporate office as well if necessary, bottom line do NOT let them off the hook. TJ's ADVICE WAS AWESOME; I GOT NEW ENGINE & CATALYC CONVERTER REPLACMENTMENT AT $0 COST, PLUS A NEW 2025 HYUNDAI SANTA FE LOANER CAR FOR ABOUT THREE WEEKS!! My Auto-Guardian Angels! ;-) Sorry this review so long, but I had to put this story out that might help someone else facing a similar recall issue and having difficult time in getting the dealership to keep their word! FACTORY SPECIFIC - Always fair pricing, awesome friendly fast customer service with a smile- good group of guys. I will refer them ALWAYS!

    After seeing how good Dad's headlights came out, I had them do mine. The headlights were so faded…read moreto the point that the light beam was refracting everywhere but straight ahead. Headlights look brand new now, but more importantly, the light is pointed to where it's supposed to be!

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    Grizzley Auto Body did an incredible job repairing paint damage on my BMW. From the moment we…read morebrought the car in, their team was professional, friendly, and extremely knowledgeable. They took the time to explain the repair process, kept us updated throughout the job, and made the entire experience smooth and stress-free. The quality of their work is truly outstanding. The paint repair is flawless and the car looks like new again, you would never know there had been any damage. Their attention to detail and pride in their craftsmanship really shows. Communication was excellent from start to finish, which is something that can be hard to find. The entire staff is welcoming, helpful, and clearly cares about their customers and the work they produce. Grizzley Auto Body has officially become our go-to body shop. If you want honest service, amazing results, and a team that stands behind their work, this is the place to go. You will not be disappointed!

    i just want to say grizzly auto body did such an amazing job fixing my daughters car from when it…read morewas hit. from the start they explained everything in detail about the whole process i mean every single step through the process even the insurance part of it. customer service was amazing. ariel answered every single question i had and i mean i had alot of them lol he never sounded frustrated or irritated at all at all my questions and i apreciate that more than anything. and to top it off they detailed the inside and outside of her car when they didnt have to do that. thank you grizzly autobody for such amazing work.

    Come2u Automotive

    Come2u Automotive

    4.7
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    Durell is the man! My wife's car had stopped running and wouldn't start yesterday morning. With how…read moreme and the Mrs schedule was we weren't able to do anything until next monday. Here comes Durell to the resuce. He was able to come out today (contacted same day) and diagnosed and repair the problem within a few hours. The car is now up and running again and now me and the Mrs aren't stressing over how we are both going to get to work. I always get nervous for any mechanic work because while my knowledge is very basic and there are bad mechanics out there who will try to up charge you or say something is broken when its not. I did not get any of these feelings with Durell. He was very Professional and was very communicative in everything while I was at work. Quick, Easy, Professional . 10/10 Would recommend.

    Durell at Come2U Automotive is outstanding! After a stressful mobile service incident in the…read moremountains, he worked around my busy schedule, came to me, and quickly repaired my vehicle. The service was fast, professional, and dependable. As a business owner who relies on my vehicle, having someone I can trust is invaluable. I've used Come2U Automotive several times and will continue to do so. If you're looking for a reliable mechanic who stands behind his work, I highly recommend Durell. Thank you, Durell, for your excellent service and for accommodating my schedule! Carla Sims-Cardwell CEO Mobile Identity Services LLC

    Equilibrium Tuning - autorepair - Updated July 2026

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