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    CT Diesel Performance

    4.3 (6 reviews)
    Closed 8:00 am - 5:00 pm

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    Services - CT Diesel Performance

    Auto maintenance

    Auto repairs

    Routine automotive maintenance

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    1 year ago

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    Major & Minors

    Major & Minors

    (5 reviews)

    Don't recommend, the shop owner seems to never be there and the mechanics might be good at their…read morejobs but can't do work without the shop owner there since they were required to get his permission to do work. They didn't charge what they should have for the repair work but they also didn't fix my car after 5 months and I had to take to 2 additional mechanics. Maybe only use them for "Minor" repairs and definitely not for "Major" repairs.

    So I accidentally put silicate based coolant in my car. Apparently, it is incompatible with my…read moreyear/make/model. This caused the thermostat to fail. A grey sludge came out - and this is to be expected (normally a head gasket but this was a chemical reaction) - Valvoline charges $100 for a radiator flush, and the thermostat at Advanced Auto was $56. Took it to this shop. They didn't touch it for multiple days as I called multiple times each day and the same story... "We haven't gotten to it yet." Then they call me and ask me what color the sludge is. Uhhh, don't you have the car? I leave a voicemail at about 5:00pm that day telling them to not touch the vehicle after quoting me $660. They told me their program on the computer calculates the time to replace and everything. I call my mechanic buddy the next city over (I would have just used him in the first place - but I couldn't get but maybe 1/4 mile at a time before it got too risky to drive at high temp.) - He uses the same programs they do - sends me a screenshot of the total time. 0.8 hours... so 45/50 minutes maybe? They wanted to charge me 4.5 hours labor. My mechanic said on the end high end and worse case scenario $400 is kind of the ceiling for this issue, tops. $250 pretty standard. I go to pick my key up this morning slightly after they open and they charge me a $50 diagnostic fee. For what? Every single time I called they said they had not been able to take a look yet (mind you this is 4:00pm the day before - right before they close). And if they took a look like they said... why did they call me to ask what color the sludge is? They never performed any diagnostics. Guy lied to me when I got there and said "I had it up on the lift and looked at it myself" - to find out what? That yup... sure looks like everything he said... that'll be $50. Doesn't matter anyways, they didn't look at the thing. Moral of the story folks, unless you realllllly badly want to get charged double, and charged for work that was never completed... don't go here. In fact, tell all your friends not to go here either. This is the 2nd time they've done me dirty as well. The first time I had an oil leak (perhaps it was my starter, one of those times) and after they "fixed" it, it was initially quoting me some insane amount like $800. So I laughed and asked to talk to a manager/owner. They called me back and said, "Ooops, I'm sorry I read that wrong, it was $400 not $800..." - wow, awfully difficult numbers to tell apart there eh? The numbers that don't look alike in any way/shape/form. Also... guess what? - still an oil leak. The issue was never resolved. Absolute trash ran business. Screwing people over is likely the only way they are staying afloat. I don't know how on earth they are keeping customers with these business practices, because they've sure lost my business, my friend's business, and my family's business.

    CT Diesel Performance - autorepair - Updated May 2026

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