In short I highly recommend you take your business somewhere other than Precision_ECU. First off when you go to the web site, they advertise their telephone number in several different spots and they encourage you to call them if you have any problems. That part is a SCAM, because I was told by Andy Grycuk (CEO), at least that was what is listed in his emails, told me point blank "We neither accept incoming, nor make any outgoing customer telephone calls.

On the masthead of their website it reads:

"We not always can pick up the phone. Please text us instead 773-800-0041".

Now, the grammar of that statement notwithstanding, it does not suggest a professional atmosphere.

In my dealings with Mr. Grycuk, I had many issues with their service over a two week period. All of those issues I had to deal with in an email environment and even when I explained to him in detail what my issues were, I didn't get the sense he wanted to deal with me and also I'd like to add to this that you had to pay for the service upfront, before the service was performed. Again I got the impression that "We have your money, too bad", was the tone of the responses I was receiving.

In short the service Precision ECU provides is to alter the ignition codes for any Mercedes or Chrysler product. My issue was that my SKREEM unit had lost its ignition security information it feeds to the ECU of the car to tell it to start. Mr. Grycuk assured me they could reprogram both units to solve the issue. When I received both units back, and I installed them back into my 2005 Chrysler Crossfire (Half German/Half Chrysler built car), the car was completely dead. I took it to a qualified Mercedes technician who told me both units were completely dead and it set off alarms on his brand new state of the art Snap-On programmer. Again, basically I was told this has to be a scam, because Mercedes DOES NOT allow anyone outside the company who is not certified to have the security codes.
In the end the services he performed on my equipment did not work. Again when I tried to contact them and communicate my problems, I got a one sentence response, ultimately, telling me that if I wanted to send my equipment back to them (At my expense of course) they would reverse the services they performed and then initiate a refund. I was advised by qualified experts to not send anything back to this company, hence I am out $400.00.

Donn Shaw
Chester, PA