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Discussion Starter #1
Hi all,

Just looking for a bit of advice for an annoying misfire.

It’s a 2003 307cc 2.0 (petrol, 138) RFN. The can misfires at low when the engine is cold – it feels like a delay between pressing the pedal and the revs climbing.

It only happens when the engine is cold and below about 2,000 revs.

So far, I have changed the air filter, spark plugs and ignition coil pack which had no effect.

I have also added Wynn’s valve lifter treatment too, and the oil looks clean/good level as well.

There are no warning lights on by the way.

Does it sound like the dreaded sticky valve lifter problem? Or is there anything else that I could check?

It’s an old cheap, car and can’t afford to spend a lot of money on it. Is there a specialist in London/Kent that anyone could recommend for diagnosis?

Any help is much appreciated as always.

Richard
 

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Discussion Starter #3
Sorry, a poor description from me. More of a shudder, especially pulling away. Feels like the car wants to stall if you don’t keep the revs up
 

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Have you checked coolant sensor live data. It maybe faulty and not seeing the cold engine

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Discussion Starter #5
Nope, I haven't! How would I do that? With a Planet (is that the Peugeot diagnostic tool) or some other device?

Will check coolant level and condition too.
 

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Planet or diagbox (official tool) would be best but any good diagnostic tool which shows live data should read coolant temp data

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Discussion Starter #7
Much appreciated! Although I don't know how I would get hold of one and what I would be looking for in terms of the data anyway.

Is there a decent garage that you could recommend that could run the diagnostics by any chance? (London or Kent)
 

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The better garages are the independent family run ones I find. A reader like a snap-on pro hand held should give a reliable reading. Does the temp gauge indicate normally when the car is up and running at "normal" temp?
 

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Discussion Starter #9
Thanks - I will bear that in mind.

I'm almost certain the temp gauge reads fine, but I will check at the weekend. Will watch it from cold.

Are they quite straight forward to replace by the way?
 

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Discussion Starter #10
Morning all,

Just a quick update - the temp gauge seems fine and temperature rises normally and stays at 90. Still a noticeable misfire at low revs when warm but definitely better once warmed up.
 
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