Honda Car Forum

OP:http://tinyurl.com/buzlr

I finally got around to checking into the poor gas mileage on my 1990
Civic wagon.

I checked the distributor cap and rotor and they seem fine, along with
the spark plug wires. I also changed all four plugs and the air filter,
and adjusted the timing, which had been a little retarded. I dumped a
bottle of fuel injector cleaner in there as well and checked the
pressure on all the tires, and we'll see how it goes. I will report
back after this tank.

One thing I forgot to do is check out the PCV valve. We'll see if my
problem gets better first and then I'll move on to additional testing.

Theo

I would check the oxygen sensor as well.......if you have never changed
it.....

theo.chan@gmail.com wrote:
> OP:http://tinyurl.com/buzlr
>
> I finally got around to checking into the poor gas mileage on my 1990
> Civic wagon.
>
> I checked the distributor cap and rotor and they seem fine, along with
> the spark plug wires. I also changed all four plugs and the air filter,
> and adjusted the timing, which had been a little retarded. I dumped a
> bottle of fuel injector cleaner in there as well and checked the
> pressure on all the tires, and we'll see how it goes. I will report
> back after this tank.
>
> One thing I forgot to do is check out the PCV valve. We'll see if my
> problem gets better first and then I'll move on to additional testing.
>
> Theo

The fuel mileage seems to have remained the same, unfortunately. I'll
check the PCV valve and O2 sensor later this week and report back.

ah1244@wayne.edu wrote:
> I would check the oxygen sensor as well.......if you have never changed
> it.....
>
> theo.chan@gmail.com wrote:
> > OP:http://tinyurl.com/buzlr
> >
> > I finally got around to checking into the poor gas mileage on my 1990
> > Civic wagon.
> >
> > I checked the distributor cap and rotor and they seem fine, along with
> > the spark plug wires. I also changed all four plugs and the air filter,
> > and adjusted the timing, which had been a little retarded. I dumped a
> > bottle of fuel injector cleaner in there as well and checked the
> > pressure on all the tires, and we'll see how it goes. I will report
> > back after this tank.
> >
> > One thing I forgot to do is check out the PCV valve. We'll see if my
> > problem gets better first and then I'll move on to additional testing.
> >
> > Theo

89 Civic authomatic. The Mileage on my car seemed to go down.
I was going to check out every part possible. I don't know if that
really help. I put a new PCV because it's so cheap. I don't know
if I want to O2 sensor which is not cheap. I checked distribuator
and rotor which seemed to fine. So what might caused problem on
mileage? I don't know if any other to look for improve mileage or I
don't have
mileage problem. I'm afraid that the engine might be the problem.
I mean the engine power probably got weaken which caused weak tranny
power. My car get around 28-32miles/gallon. What is yours?

mmdir2005@yahoo.com wrote:
> power. My car get around 28-32miles/gallon. What is yours?

28 to 32 isnt BAD, but if youve noticed the mileage going down, it could
be due for a simple tuneup-

plugs
oil change
air filter

if the wires, dist rotor, etc is original, it should be replaced too.
same with the O2, which makes the biggest difference, i think.

had the same problem. my accord mileage went from @27-22 to @22-17 and
all for a stupid O2 sensor. when i got that replaced, all was back to
normal. good luck


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