Hey everyone, I’m writing this because I need ur guy’s help and opinion. I have a 2018 Honda Accord 1.5T that I bought this month, got it at a dealers auction was in limp mode when I got it but I figured take the risk could be easy fix I fixed it by replacing burnt old spark plugs then couple days later my brother was driving accelerated in the freeway went into limp mode again. After, went to my mechanic and we saw misfire was in cylinder 2 we check spark plug was loose and replaced the cheap autolite(new) with NGK spark plugs did oil change as well. Drove home and put it in sport mode accelerated fast went 5-6RPMs and it went into limp
Mode again and I was like what the hell cause thought problem was fixed. Took it to dealer for recall on pump and told them to check it out they told me head gasket and fuel injectors which is issue in these cars. But misfire is in cylinder 4 which has aftermarket coil and called another mechanic and he said that he doesn’t think it’s the head gasket because dealership said fuel injector is running rich meaning it wouldn’t be head gasket issue and I haven’t had any overheating issues and coolant hasn’t dropped, oil looks good. Only happens after 3k rpms which is when more pressure and fuel takes place so he said it could be the coil so my question are.
What do you guys think? Could the dealership have misdiagnosed it? If it is the head gasket issue what could I do or using goodwill program? I’m going to replace coils first to see if it solves it. How have u guys dealt with this issue?