Hi,

The valves were adjusted too tightly, I am pretty much sure some of
them were burnt to an extent before I set them back to specs.. So do
the symptoms below seem to gel with that, burnt valves and compression
loss?

Thanks

es
George Macdonald <fammacd=!SPAM^nothanks@tellurian.com> wrote in message news:<e51i701qp7jt7cino23a2iu3tvhc5ocs03@4ax.com>. ..
> On 10 Apr 2004 15:11:35 -0700, ramswaroop@hotmail.com (eswaroop) wrote:
>
> >Badly need help figuring out what is wrong. All this started after a
> >valve adjustment which was done improperly, and fixed later by me.
>
> What engine is this? Are you 100% sure valves are OK now?
>
> >Here is what I know till date. The car runs okay for the first 15
> >minutes or so and then the performance and mileage drop drastically.
> >It seems to limp around even if I floor the pedal.
> >
> >No CEL codes
> >
> >The ignition timing advance is 10 degrees during idle ( must be
> >between 11 and 13 according to the honda diagnostics unit).
>
> The L4 engine spec is 12°BTDC +/-2° so it's close.
>
> >The spark plugs are blackened (sooty, so rich mixture)
> >
> >The o2 sensor is shifting between .1 and .89 volts, but quickly enough
> >or not - I dont know..
> >
> >The car revs smoothly, too smoothly than it ever did earlier in fact
> >(maybe sign of retarded timing)
> >
> >I think the exhaust is heating up a lot more than usual (again sign of
> >retarded timing?)
> >
> >Drives okay for around first 15 minutes, then acceleration and
> >response declines drastically as I drive longer, mileage also suffers.
> >
> >What could be wrong??
>
> Is the engine getting up to full operating temp?... maybe think about
> changing thermostat anyway?? I believe your car still has separate temp
> gauge and ECT sensors so the next thing I'd check is the ECT sensor for
> resistance when engine is hot. Other than that it could be a sensor
> problem someplace else - TDC, CYP, throttle position, MAP, etc. Start by
> checking harnesses and connectors.
>
> Have you checked that the MIL lamp is working at ignition on? The fact
> that you're not getting a MIL when the thing is so obviously out of whack
> could also mean the ECM is bad.
>
> Rgds, George Macdonald
>
> "Just because they're paranoid doesn't mean you're not psychotic" - Who, me??