Rep Power: 0

I have a 1995 Honda Civic CX w under 80K's. Over the last 1500 km, I've noticed that the fuel economy has gotten worst (from 42-46 mpg to 32-33 mpg) and on the highway, it tops out at 120 kph. Otherwise, the car starts and drives fine. I've checked the coolant, exhaust, air filter and oil, and everythings seems fine. Before I commit to a leakdown test (aarrgghhh!!!), are there any common (ie. cheaper!!!) problems that I should consider?

Would appreciate any advice on the matter,

1995hondacivicx.

 
Rep Power: 287

I think it's possible economy can be reduced by dirty spark plugs, dirty fuel filter, and sometimes oxygen sensors. Although all of that stuff would just have to be pulled out and looked at or replaced, the parts aren't too expensive, but getting the parts out might be. If you've done more stop and go driving over the past 1500km, that'll do it. It could be a couple things.