Jez <jeremy@ainsworth.me.uk> wrote in
news:WfmdnbII9c_9QNHenZ2dnUVZ8qudnZ2d@pipex.net:

> Hi chaps,
>
> 96 Civic, 78,000 miles, automatic transmission.
>
> I posted about this a few weeks ago. The RPM on my civic is
> hunting/oscillating by +-200 when driving at roughly 35mph up a light
> hill with the correct throttle position to maintain that speed. It's
> indicated on the gauge, by changing engine sound, and by very gentle
> thrusting forward whenever the RPM increases. Imagine the RPM needle
> going up and down about once or twice per second.
>
> Curly advised checking the TPS (no problem found) and using injector
> cleaner which I've done. jim bean suggested checking the ECU codes but
> nothing was stored.
>
> Does anybody else know what might be causing this problem?



At this point it sounds like misfiring under load, usually ignition
related. Most engine problems are due to ignition, not fuel.

Your OBD-II system *should* set an error code if that's the case.

Do you have EGR? Your under-hood sticker will say so if you do.

How old are your plug, plug wires, distributor cap and rotor. Do you have
any aftermarket parts?



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TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/