NHTSA Complaint #11453295 — 2007 HONDA ACCORD

Engine acceleration while braking. After a short 15 min trip I returned home and entered driveway which is sloped down hill. Depressed brake and engine RPM went from about 1000 to over 3000 RPM. Released brake for a sec and tapped accelerator. RPM went back down and brakes returned to normal. I thought that loose carpet on mat may have interfered with accelerator and I removed it. About 5 hr later I was travelling for about 20 min on 55 mph highway and approached a red light. I depressed brake and slowed down to 5-10 mph. Engine rpm again went up to 3000-4000 RPM, I put automatic transmission in neutral tapped accelerator and RPM returned to idle 800. This again occurred for 5 more times before I returned home. When I pulled into my drive way I slowly reached the end and put the car in park, set the emergency brake, and let it idle for about 30 sec. I then depressed the brake a little and the RPM increased from 800 to just over 1000. I then depressed the brake harder and the RPM shot up to about 4000. At no time was the accelerator depressed or moved. I shut off the ignition and attempted to duplicate the error but could not. I also checked all the vacuum lines from the brake booster for leaks. There were no warning lights and a scan did not indicate any trouble codes. I have not brought it to a dealer as I am seeing if I can reproduce and troubleshoot the problem. I am an engineer and have done all my auto service and repairs for close to 50 years. This includes rebuilding engines, transmissions (manual/auto), and electrical troubleshooting. I can assure you this is not due to floor mat interference or incorrect application of pedals.