Well I'm new here and I think this is the right place to put this thread. I have a 1998 accord lx with the 4 cylinder. It has recently got a new computer and plugs wires cap and rotor. Also I think the whole distributor is new.

Now to the problem. I am only getting 190 miles to a tank of gas. I used to get about 390 or more to a tank. Not sure what is going on. I really don't have the money to take it in again. I am pretty good with cars and trucks but nothing this new. I thought maybe that my catalytic converter is clogged or something. I would love to know all the little quirks of these. It has 205000 on it right now. I changed the timing belt at 175000. There is no check engine light or anything on also. Don't know a lot about them. I hope you all can fill me in and I can get to know you all.

Jon

 

That much loss of fuel suggests a leak. Some prime candidates:

1) corroded fuel lines
2) leaks at injector/fuel rail connections (orings worn out)
3) Fuel pressure regulator diaphragm ruptured allowing raw fuel to be pulled into intake through vacuum reference line.
4) Leaking fuel line connection (if any have been broken previously)

If no leaks can be detected, a replacement O2 sensor should be considered. Occasionally they can get "lazy" and cause poor fuel consumption.

If you can borrow an OBD2 scanner, check long term fuel trim (LTFT) to see if it's running high.

good luck

 

Did your MPG get worse gradually? Did it happen all of a sudden, like maybe when you changed the timing belt?

Are you just going by the fuel gauge? Note the mileage AND THE GALLONS when you fill the tank.

 

No, it just happen like in the last 2 months. Nothing has been done to it for a while.

 

My question about the gauge is the possibility that the gauge is flaky and you think it's empty when there's still gas in it. How many gallons?