Peugeot 207 gti rough idle
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  1. #1
    AAA
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    Default Peugeot 207 gti rough idle

    Hi would like to ask if any one had a same problem like mine when I start the car it has a rough idle. Would this be the map sensor need replacement????

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  2. #2
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    How many km on yours? When were the spark plugs last changed?

  3. #3
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    Spark plugs just got resently change itís got 105,000kms I have change coil ignition, sparks plugs , alternator belt , water pump, timing chain , just have major service on it last months.


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    Is there a idle air control sensor on this car ??


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  5. #5
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    Is it misfiring or just idling rough?
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  6. #6
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    What could be if it misfiring ?

    Or

    Just rough idle ?

    Iím not sure if itís misfiring....


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  7. #7
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    Stick your hand behind the exhaust pipe. A misfiring cylinder will cause the smooth gas flow to stop-start. Like puffing.

    Usually a misfiring cylinder will be detected by the oxygen sensor which will bring up a pollution warning message. Misfiring damages the catalytic converter. The best thing you could do is get a Diagbox and see what the computer has stored.

  8. #8
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    Ok so itís time to change catalytic converter


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  9. #9
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    If it is misfiring fix that first or you will waste $$$.

    With the 1.6 THP engine one cause for a misfire is a crudded up inlet valve, which ruins the air/fuel ratio for the cylinder. If it hasn't been cleaned in 100,000+ km give this serious consideration.

    Use the low ash C2 oil as used in the diesels to minimise these deposits.

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    How do you clean it ???


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    Cleaning is major work, so get a computer readout and diagnosis first to be sure. You don't need regular belt changes with this engine, but cleaning has replaced that service.

    You remove the air filter and ducting, the battery, the inlet manifold, and probably the injector rail and injectors. You can now see into the inlet ports with the aid of a mirror and torch. Peugeot make an expensive softening agent, applied after the stripping process, to soften the crud which is actually "ash" residue from oil vapour burnt on. It adheres ferociously.

    Some people scrape it off using a mirror and small sharp scraper, some send it for a walnut blast. Either way it's pretty well an all day job.

    If you aren't an experienced DIY mechanic consider getting a professional who knows the engine - there are solenoids, connectors, and fixngs that are completely hidden behind the engine under the windscreen, to be worked on blind

  12. #12
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    Here's someone who discovered the access and view problem - 207 THP 150 - Intake manifold removal - Peugeot Forums

  13. #13
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    Ok thank you


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  14. #14
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    Where are you. Some states have access to cheap walnut blast... others not so much. On the Gold Coast you can get it done for ~$300 other places up to $600. After getting mine done my car was completely different. It is a problem that becomes relly apparent at around 100-150k.
    2007 207 GTi - adding bits to make it go faster soon

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    Whatís a walnut blast ???


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    All good I got it now just YouTube it to find out.


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    Iím located in Sydney
    inkevitch


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  18. #18
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    Quote Originally Posted by AAA View Post
    Iím located in Sydney
    inkevitch


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    Ahh okay. No idea then. But someone might have mentioned in these forums so search walnut blast, 207gti etc.

    Some of the garages that cater for minis will do it. The place I went to is eurotune in miami gold coast.

    In hindsight, I think it was changing my timing chain that improved the idle chatter. They need to be changed every 80k as a regular service, mine had been on for 60k, but was loose and the timing bolt was failing (it had lost its resistaence to compression so could be easily squeezed)

    It is bloody expensive to get the timing chain done and it seems like that is often the catalyst for people selling on as this is a 800-1200$ service

    Ask some other people for their advice regarding this.
    2007 207 GTi - adding bits to make it go faster soon

  19. #19
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    There's a thread running on carbon (actually ash deposit) cleaning at the moment. Most normal driving will require it well before 100-150,000 km. A big job because of the disassembly. You have a choice between walnut blasting, soda blasting and hand scraping. All methods work.

    I haven't heard of anyone doing regular chain replacement. Early chains had problems and Peugeot and Citroen replaced nearly all of them. It is a slow job needing special cam setting/locking tools, and isn't done lightly. Fuel trims can give an idea of how the chain is getting along.

  20. #20
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    I did it at 140k (when I bought it), it shouldn't have been due for another 20k. But I had so many things done at once so it is hard to say what improved its running. But the tensioner bolt was no longer putting the chain under enough tension.
    2007 207 GTi - adding bits to make it go faster soon

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