Alright, little history on my car.
It's a 1994 Ford Aspire with a 1.3L I4. I bought it at 102k miles for $500. Some old lady had it before me and didn't take care of it. When I bought the ignition was stuck on acc and the key wouldn't come out, the exhaust was broken after the cat, the head gasket and intake gasket were so bad oil/coolant was one mixture, and several little dings here and there.
So I fixed the heat gasket, exhaust, etc. I was getting 40 mpg highway and 36 in the city.
Then things went bad. At one point I was down to 22 mpg. Switching to AMSOIL jumped be back to 30 and I've been fighting ever since.
New plugs (twice now), new fuel filter, new tstat, new exhaust manifold to fix a leak, seafoamed twice now, etc etc etc.
It went 40 mpg to 33 overnight and steedily declined. I could get 35 mpg on the highway for a while if I did 55 and not 65 or 70.
I can finally get 32 to 35 mpg now. However, my spark plugs are white. I know I'm not burning coolant because my UOA shows no water/coolant in my oil. I had 2.5% fuel after 4053 miles.
I did a compression check and cylinder #3 has low compression due to bad rings. However, all 4 plugs are white as a ghost.
http://home.mchsi.com/~xetornnad/plugs.jpg
That's after about 7000 miles. I just put in new plugs. I went with a heat range colder. So far I've only gotten to check my MPG once and it wasn't far because it was super windy. I got 27 mpg on the highway, but I had to keep it on the floor just to do 65. =) Poor little car.
Alright, so do you think the injectors are dirty and just not closing all the way? Something else? Anything else? The engine now has almost 117k miles on it. It's a mazda engine that usually lasts near 300k miles, but mine wasn't treated nicely by the old lady.
I've put maybe 5 bottles of Techron though it in the past 6000 or 7000 miles. No change.
It's a 1994 Ford Aspire with a 1.3L I4. I bought it at 102k miles for $500. Some old lady had it before me and didn't take care of it. When I bought the ignition was stuck on acc and the key wouldn't come out, the exhaust was broken after the cat, the head gasket and intake gasket were so bad oil/coolant was one mixture, and several little dings here and there.
So I fixed the heat gasket, exhaust, etc. I was getting 40 mpg highway and 36 in the city.
Then things went bad. At one point I was down to 22 mpg. Switching to AMSOIL jumped be back to 30 and I've been fighting ever since.
New plugs (twice now), new fuel filter, new tstat, new exhaust manifold to fix a leak, seafoamed twice now, etc etc etc.
It went 40 mpg to 33 overnight and steedily declined. I could get 35 mpg on the highway for a while if I did 55 and not 65 or 70.
I can finally get 32 to 35 mpg now. However, my spark plugs are white. I know I'm not burning coolant because my UOA shows no water/coolant in my oil. I had 2.5% fuel after 4053 miles.
I did a compression check and cylinder #3 has low compression due to bad rings. However, all 4 plugs are white as a ghost.
http://home.mchsi.com/~xetornnad/plugs.jpg
That's after about 7000 miles. I just put in new plugs. I went with a heat range colder. So far I've only gotten to check my MPG once and it wasn't far because it was super windy. I got 27 mpg on the highway, but I had to keep it on the floor just to do 65. =) Poor little car.
Alright, so do you think the injectors are dirty and just not closing all the way? Something else? Anything else? The engine now has almost 117k miles on it. It's a mazda engine that usually lasts near 300k miles, but mine wasn't treated nicely by the old lady.
I've put maybe 5 bottles of Techron though it in the past 6000 or 7000 miles. No change.
