Day 3 of ownership and already getting sputtering and CEL blinkage. CEL was on when I bought it, but the test drive ran great. This motor was supposedly a replacement with 70000 on it as the original had a bad knock. Already thinking about the O2 Sensor del and punching the cats as we have no emissions in this county. Motor sometimes runs great. After 3000 rpm it runs like a top. Dealer is looking at it tomorrow since its got a warranty.
Question: Could low octane gas cause this? When I bought it I filled up with 87 not knowing it takes higher grade. It ran ok with some slight sputtering at 55mph but would come out of it after about 2000 rpm. Ran that tank almost out and filled back up with 91. Sputters worse now, and now the CEL blinks.
Question 2: Should I be asking this question somewhere else in the forum as Im new to this form of discussion.