Really bad gas milage
Well 1st off I guess I should introduce myself as a noob. Long time visitor, 1st time poster. I drive a 96 T-bird with a 3.8L engine and love it to death. I bought it about 2 years ago and have never really had problems with it, it's been a very reliable car. Until now.
Well here it goes. My gas milage has gone to crap with the start of winter. I used to get right about 350 miles on a full tank of gas, but now I am lucky to get right around 225-275 on a full tank.
My spark plugs say that my car is running rich, which i havent found out why yet because they are a little black on the end. My check engine light is on, but only because of the cam shaft positioning sensor, which i've replaced already. I've already put heet through the system which seemed to make it run a little bit better with the gas milage, but not a whole lot. I replaced the fuel filter not too long ago, ran some fuel injector cleaner thru it, had the oil changed and all that good stuff.
The only thing that I can really see could be a problem (I dont know) I upgraded to the 180*F thermostat after reading bout it here. Which is making it run colder (thermostat doesnt get up to normal, stays below the N) or i've been told that my cat could be clogged up. I really have no clue.
BUT! here's one thing that I think may link to this/be the cause.
When I go out and start my car up, I'll let it run for a little while. I'll shut it off and then I cant get it to start again. It tries to start but wont turn over. Keep in mind this is after warming up, or right after I 1st start it. Finally it will turn over just a tiny bit, and I actually have to push on the gas pedal to get the car to go. Now I know this car isnt carborated, so there's gotta be something wrong here with something for the fuel. My computer doesnt come up with O2 censor replacement, but could that be a possibility of replacement?