I just bought a 200 Mack rd688 e7 350 using it as a debris loader truck. I recently had the brake lights fixed rewired and soon after my truck started shutting down while driving down the road. If left in gear it will pick its self back up and start running again. The problem does seem like its getting more frequent. The truck will also shut down while at idle turn the key fires right back up. Checked fuel filters air filter and the normal easy stuff but to no avail. I'm wondering if anything may have been broken loose during the light fix I.e. grounds and so fourth the truck does seem under powered I even lose mph climbing a small hill while in top gear empty.