That mileage is pathetic.

When's the last time you replaced the PCV valve? I replaced mine on my 91
Civic for the first time (way overdue) two years ago, and the mileage shot
up.

The plug wires?

Fuel filter?

Air filter?

All of these are easy to do, inexpensive, and could be a part of, if not
the, problem.

"Bruce" > wrote
> A few more issues from my poor little car for anyone who can shed some
> light...
>
> My '90 5-spd Civic Ex has been bogging down at low RPMs since I bought
> it last fall. When I accelerate from a dead stop I have to goose it to
> about 2500rpm and then pop the clutch a bit to get it to take off as
> quick as I think it should. Especially in an up-hill situation. (no AC)
>
> If I drive it like other small manual 4-bangers I've owned (Corollas,
> etc), it will literally take 5-10 secs to get to the point where I
> think I should shift to 2nd. Gas pedal down half way or floored makes
> no difference. Also, doesn't matter if the car is at temp or just
> started. After 1st gear and I'm moving a bit, there's no problem. I
> seem to remember reading about a potentiometer (maybe in the throttle?
> can't remember the details) that, if the contacts were dirty, would
> cause this type of thing. Maybe I'm just crazy and I dreamed this....
>
> I'm also getting only about 15-18mpg in town and 20-23mpg hwy this
> summer... seems incredibly low. Was getting the same last winter, but
> wrote it off to cold weather. Spark plugs are about a year old, newish
> air filter, and OEM O2 sensor's only 6 months old.
>
> ECU's not throwing any codes.
>
> -Back pressure too low/high? (bad catalytic converter?)
> -Bad plug wires? (I'm sure they're not Honda OEM wires, but I think
> they're only about a year old)
> -Clogged EFI?
> -Timing out of adjustment? I didn't fool with the dist. when I changed
> the timing belt, mostly because I couldn't find a damn marking anywhere
> on the crankshaft pully to save my life. Ran like a top after the belt
> change, so I'm confident it's not a tooth off...
>
> HELP!
>
> Any advice would be greatly appreciated...
>
> Regards,
> -Bruce
>