I was running 89 octane gas in my car for the first 2 fill ups since I bought it. I went to 87 on the last fill up and it threw a CEL. It is not a steady light. It flashes at random patterns. Once the car gets warmed up, the CEL goes away. The car feels as strong as it did on 89 and I do not hear any pinging. I do not have access to a code scanner but I will be buying one this weekend. My question is, could the change in octane cause the CEL? I will pull codes this weekend and clear the codes along with going back to 89 octane and see what happens.
BTW the car is a 92 LX with Capri flared fenders and about 75000 miles on the clock. Motor is stock, K&N replacement filter, and Flowmaster muffler.
BTW the car is a 92 LX with Capri flared fenders and about 75000 miles on the clock. Motor is stock, K&N replacement filter, and Flowmaster muffler.