So heres a weird one. Last year my 94 Mark was acting like it was not getting enough fuel, as if the pump was dying. It would not rev over 3000ish rpm with over 1/4 gas left in the tank, and barely over 2200 rpm with low fuel. This was like 4 months after replacing the fuel pump. Shortly after, I bought a very low mileage 95 that was practically flawless and never saw snow. At this point I didn't really care about the 94 since it would just pull winter duty now anyway.
So, winter comes back along 4 months ago and I start driving the 94 again. I go to the gas station and decide, meh, Ill just put regular fuel in it since I didn't really care for it like I used to. I gunned it to see if the problem was still there and woah! Power! It had absolutely no problem pulling. I figured it magically fixed itself somehow. This trend continued for months until about a week ago when I decided to put use premium again to see if I was missing any performance with the regular, which I was sure I was. Fill up, gun it, and huh? Won't go over 4000ish rpm again. Clearly lost a lot of pull prior to getting to 4k, then falls right on its face.
So, what gives? Regular fuel it will pull no problem and doesn't smell. Premium fuel and I get a real bad sulfur smell from the exhaust after gunning it and it won't rev. I also got the occasional check engine light last year when using premium fuel, but it never came back after I started using regular.
So, winter comes back along 4 months ago and I start driving the 94 again. I go to the gas station and decide, meh, Ill just put regular fuel in it since I didn't really care for it like I used to. I gunned it to see if the problem was still there and woah! Power! It had absolutely no problem pulling. I figured it magically fixed itself somehow. This trend continued for months until about a week ago when I decided to put use premium again to see if I was missing any performance with the regular, which I was sure I was. Fill up, gun it, and huh? Won't go over 4000ish rpm again. Clearly lost a lot of pull prior to getting to 4k, then falls right on its face.
So, what gives? Regular fuel it will pull no problem and doesn't smell. Premium fuel and I get a real bad sulfur smell from the exhaust after gunning it and it won't rev. I also got the occasional check engine light last year when using premium fuel, but it never came back after I started using regular.
