My wife's 993 was running just fine last week (Oct. 24, 25). On Oct. 31, 2015 I put in some techron fuel injector cleaner (about 1/2 bottle) into the gas tank which was 1/4 full of fuel. She had then later went and filled up the tank with Sunoco Ultra 93 about 3 miles away. The car ran fine during Sat. Oct. 31. Unfortunately on Sunday afternoon she called me to tell me that the car started suddenly to make an awful popping noise and the check engine light came on. I had the car towed home and observed the tail pipe looked sooty and the car was backfiring quite violently . Unfortunately before I had a chance to hook up a factory tester I had accidentally disconnected the battery to install a battery tender and cleared the fault codes that had been stored when the engine started backfiring. Upon restarting the car and after only running it for 2 min, the only fault codes that came up are 3 within the ventilation system (cold air flap error or implausible reading, fresh air blower motor seized) and 1 fault code with the tiptronic module. I intend to remove the sparkplugs for inspection (they're probably fouled from running the concentrated Techron through). My question is what else could be the cause and what damage has been done?
11-02-2015, 11:36 AM
