TeGGeR® wrote:
> 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?
>
>
>
Hi TeGGeR®, thanks for replying

There is no EGR noted under the hood. I've also checked the Haynes
manual which states EGR is only on D15Z3, D15Z6, D15Z8 and D16Y5 (mine's
a D14A2).

I'll ask specifically for an ODB-II scan at the local service station.

The plugs are new, I replaced them on schedule last week with Bosch
Super-4's (recommended by the store). There were NGK's in there
beforehand. Changing the plugs hasn't solved or changed the situation.

As far as the plug wires are concerned, I tested their resistance and
all are below 25KOhms (12,10,8,7 longest to shortest). I don't know when
they were last replaced. No record so maybe never. Again, not sure when
the cap and rotor were replaced. I inspected the cap but I should look
at the rotor in this case.

Jez