clio exhaustion lamp flickers?

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anglomont@yahoo.com - 09 Nov 2006 13:35 GMT

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clio2/1.2 exhaust problem indicator lamp (to the left on the dashboard
)flickers/stays on and also the engine is kind of lacking power and not
working smooth when cold-are the older sparks the problem and if so
what tool to use to unscrew them? I did try unpluging one by one spark
with engine running and since each affected the engine none of them is
completely at fault

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Coyoteboy - 09 Nov 2006 14:13 GMT

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>g and since each affected the engine none of them is
> completely at fault

Make sure you ground your spark plugs/leads when pulling a lead off as
you can damage the ignition components by just letting them sit
anywhere.

But it sounds like you have a more serious problem - your exhaust
light, i would assume, is a CAT temp sensor? IF its coming on its
because the cat is overheating, usually due to running very rich due to
a misfire or incorrect air measurement, or maybe a coolant temp sensor
going bad.

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Sandy Nuts - 11 Nov 2006 19:15 GMT

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> with engine running and since each affected the engine none of them is
> completely at fault

As a side note; you shouldn't just disconnect the HT lead on a car fitted
with a catalytic convertor. You could end up with two cylinders pumping neat
petrol down the exhaust, and into the cat.

A just as effective way of determining a faulty sparker is to disconnect the
fuel injector. That way fuel isn't being injected and the ignition system
doesn't take undue strain.

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anglomont@yahoo.com - 12 Nov 2006 12:28 GMT

Thanks for input
the car manual says lamp is diagnosing exhaust control system and
should flicker for 3 sec upon starting engine.Dont know if cat sensor
is temperature but the engine temp sensor is ok since it's gauge on the
dashboard moves normally. I suppose since I remember running out of
gas, some valve in electronic ignition(actually monopoint as my friend
says) got dirty from the mud off the reservoir bottom. Would that be
complicated to take apart to clean(and assemble again!) and as for
other suggestion I suppose once I disconnect the fuel I can only check
the sparks visually, say in the evening?

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> >
[quoted text clipped - 12 lines]
> fuel injector. That way fuel isn't being injected and the ignition system
> doesn't take undue strain.

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