1989 losing its fuel efficiency! Why?

Comments

• imprtedcivic Band Wagon

  June 2011

  does the car still run fine?
  
  may be your fuel filter, injectors.
  
  could use a basic tune up.
• Silvertoe88RT Wagonist

  June 2011

  Tune up? Plugs wires cap rotor, Fuel system treatment "SEAFOAM" It kicks B*$$. Read the can.
  That would be a great start, Then adjust valves, Timing. Tire pressure and alignment help to.
  
  I swear by Seafoam, I use it in every gas engine and it does work. it cleans carbon build up on the pistons and valves, fuel stabilizer and fuel injector cleaner.
• cbotha Band Wagon

  June 2011

  Have you tracked the MPG and noted has gone from 35 to 33 or 35 to 20 or ??
  
  Are you using gas stations the are blending more ethanol into the fuel (mileage will be less with the blends)?
  
  Has performnace dropped in the car? Does it drive differently>
  
  Do the basic tune up stuff as suggested ( if it hasn't already been done)
  
  More sophisticated do a compression test and a leak down test to see if something mechanically has worn out.
• fast freddy Wagonist

  June 2011

  Check ur o2 sensor.
• punx45 Band Wagon

  June 2011

  check tire pressure, wear and alignment. in cars with lower power small things like that can make a big difference.
• syd Band Wagon

  June 2011

  have you actually measured MPG and does it seem to be seasonal? Some places use different fuel in between winter and summer.
  
  Lastly, could your Catalyst be on its way out?
• Silvertoe88RT Wagonist

  June 2011

  I was reading up on common problems with the civic, I read one about the o rings in the injectors not being able to withstand the fuel and slowly deteriorating causing the car to use more fuel. Its a thought. Good luck with the mpg.