SprintBooster Installed/Check Engin Light won't go off.
 

I installed the sprintbooster tonight, went on a drive. The check engin light did not go off and the car did not have any power. Well not a lot of power. I uninstalled and installed again this time the car would not start. I made sure all the connectors were connected firmly. The car started and still has check engin light. I uninstalled and now the check engin light is off.

Please any help on the install would be great. I have the new verson sprintbooster for my 2010 Mini Cooper S R56.

I had a Sprint Booster on my 2010 justa for awhile but didn't care much for it (returned it within the trial period). Your problem sounds like it's almost certainly an electrical fault within the Sprint Booster. Do you know anyone else who has one that you can try? I'd contact the retailer and swap yours out for another one.

Thanks I will see what Way says.