I have, from the day of installation, my check engine light has been on . Today I had the interlock removed and not 30 minuted later my car started stuttering. I live 30 plus miles that the car had to be driven 35mph in a 65mph speed limit the entire time. When exiting off the highway the power steering went scaring my 74 year old mother. We made to Advance Auto were they checked the car and determined that the transmission solenoid was bad. After researching I see where the transmission contol unit has something to do with retarding igniton timing. Now, I am no mechanic, but I have believe this is how they are connecting the interlock/ I realize that DWI is the reason for having this system in the first place, but, does getting DWI mean you have to accept someone damaging your vehicle, costing big money to fix, and time without the vehicle, not mention the fact the whole incident could have caused a wreck, because of the vehicle malfunction.
Its very possible but its only wired to the vehicle’s ignition system from the ones that I have seen and the installers from what I read are certified but at the same time they may have either connected the unit to the wrong power source or disconnected something and you need to have a professional auto repair shop look into this and if they find that it was installed incorrectly have them document this so that you can go back to the company and request a full reimbursement
