I am new to this forum and have joined it out of extreme frustration with Toyota service. I would appreciate any ideas to take care of the problem.
My 2001 Corolla started pinging upon acceleration when it had 20K miles on it. It pings when accelerated even under no heavy load condition i.e. going downhill. I took it to the local Toyota dealer who sent me back every time with the advice to change the fuel grade or change station. I have been using 93 Octane for a long time and have used different stations. They performed a top engine decarb upon my last visit. Now the car has 37K miles and pings like an old car with valve problem. I filed the complaint with Toyota and they forced me to go for arbitration. I told them that I just wanted the problem resolved but they wanted me to go for arbitration. That whole process was a joke and the outcome was obvious i.e. denied. The so called arbitrator was so friendly with Toyota service director that they were talking about vacation. The independent arbitrator even knew that the service director got married recently. First the Toyota tech blamed me and asked for service records. Upon finding no problem with service records, he said that this is not pinging but detonation which according to him was normal for this engine. When I insisted that it was not, he started blaming the previous owner of this car.
Anyway the situation now is that the car pings. Toyota used arbitration as an excuse and I can’t think of anything to do now. I have used all the fuel tank additives including Redline but none works.
Please let me know if I can try anything from repair to setting the car on fire. The car has a DIS so timing cannot be changed.