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Thread: Hello and I need a help with misfire EPC/Engine light issue

  1. #1
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    Hello and I need a help with misfire EPC/Engine light issue

    I have bought 2013 Golf 1.2 TSI a month back. I bought it from a private seller but since I bought we couldnt use it due to an international trip. Now after a month parking on I am having misfire issue with this car and Engine light start flashing with EPC on dashboard. I took it to a local garage and he said one of the coil (number 3) is faulty, he changed the coils pack and all plugs. After changing the coil packs and plug I drove it for few miles it was all Ok but today again started misfiring and same Engine & EPC light on dash board. If I use it in lower gears 2/3 in manual mode it doesnt do much misfire. I took it to mechanic again and he said number 3 is faulty again. I said ok can you replace this with other one to understand if the coil is faulty before we buy a new one? He replaced it with second one but still getting error with number 3 which at least confirmed its not coil issue. Now he is saying it could be wiring or piston or any other issue. I wasn't very comfortable with his approach so simply took my car out from his garage.



    Any help would highly be appreciated.
    Sam

  2. #2
    Administrator Crasher's Avatar
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    The engine warning light and EPC light can come on for many different reasons, the standard easy test is to clear the fault codes with the engine running, if the misfire stops then it is an internal engine problem, likely a worn valve guide. The reason this happens as the ECU can tell which cylinder has a problem and so it shuts down the fuel supply, many inexperienced mechanics think wiring or faulty injector and fit parts not required. If the misfire does not clear when the codes are erased then it is usually a faulty coil pack. Unfortunately these engines are becoming extremely prone to this problem and from the ones we have done my engineers put it down to poor quality valve guide material. It is worth mentioning that not removing the coil packs if possible is good for them as being extracted strains them and a special VAG grease should be used to prevent the rubber sticking to the porcelain.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

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    Quote Originally Posted by Crasher View Post
    The engine warning light and EPC light can come on for many different reasons, the standard easy test is to clear the fault codes with the engine running, if the misfire stops then it is an internal engine problem, likely a worn valve guide. The reason this happens as the ECU can tell which cylinder has a problem and so it shuts down the fuel supply, many inexperienced mechanics think wiring or faulty injector and fit parts not required. If the misfire does not clear when the codes are erased then it is usually a faulty coil pack. Unfortunately these engines are becoming extremely prone to this problem and from the ones we have done my engineers put it down to poor quality valve guide material. It is worth mentioning that not removing the coil packs if possible is good for them as being extracted strains them and a special VAG grease should be used to prevent the rubber sticking to the porcelain.
    Thanks Crasher,
    So what are the options any recommended garage near Luton or shall I take it to VW garage? I am not that technical but dont want to take it to mechanics which use youtube to fix the issues and end up more costly as compare to specialist.


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    Administrator Keithuk's Avatar
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    Welcome to the forum.

    Its nice to see you made an intro on your own.

    As said you need to get your motor scanned (preferably with VAG-COM\VCDS) for any error codes logged in the ecu and post them, that will save a lot of guessing and check systems out.

    We do have VAG-COM/VCDS User Locations but very few members add their details.
    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Transmission Code: KXZ, Flat Tyre Indicator, Basic Protection Pack + VCDS.


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    Quote Originally Posted by Crasher View Post
    The engine warning light and EPC light can come on for many different reasons, the standard easy test is to clear the fault codes with the engine running, if the misfire stops then it is an internal engine problem, likely a worn valve guide. The reason this happens as the ECU can tell which cylinder has a problem and so it shuts down the fuel supply, many inexperienced mechanics think wiring or faulty injector and fit parts not required. If the misfire does not clear when the codes are erased then it is usually a faulty coil pack. Unfortunately these engines are becoming extremely prone to this problem and from the ones we have done my engineers put it down to poor quality valve guide material. It is worth mentioning that not removing the coil packs if possible is good for them as being extracted strains them and a special VAG grease should be used to prevent the rubber sticking to the porcelain.

    If we say this is Engine valve job, how much s it will cost roughly?
    2013 Golf 1.2 TSI

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    Administrator Crasher's Avatar
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    PM me your reg number
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

  7. #7
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    Quote Originally Posted by Crasher View Post
    PM me your reg number
    please check your inbox
    2013 Golf 1.2 TSI

  8. #8
    Administrator Crasher's Avatar
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    If it does turn out to be worn guides, with how complex the CJZA head is and how many parts are involved, if we had it in we would strongly recommend a genuine VW exchange head at 1310.09 which comes fully built with new hydraulic valve lifters, the old finger followers must be kept in order and re-used or replaced BUT there is a huge pile of extra parts also required such as head and cam frame gaskets, head bolts, manifold gaskets, oil, coolant and cam belt kit so I would say 2000 in parts and two full days labour. Typically the job would come out at circa 3K, if it was rebuilt instead of a VW exchnage head being used (which would probaly save around 300), you would not have the VAG 2 year warranty which includes parts and labour and applies even if the head is not fitted by a VW dealer.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

  9. #9
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    Quote Originally Posted by Crasher View Post
    If it does turn out to be worn guides, with how complex the CJZA head is and how many parts are involved, if we had it in we would strongly recommend a genuine VW exchange head at 1310.09 which comes fully built with new hydraulic valve lifters, the old finger followers must be kept in order and re-used or replaced BUT there is a huge pile of extra parts also required such as head and cam frame gaskets, head bolts, manifold gaskets, oil, coolant and cam belt kit so I would say 2000 in parts and two full days labour. Typically the job would come out at circa 3K, if it was rebuilt instead of a VW exchnage head being used (which would probaly save around 300), you would not have the VAG 2 year warranty which includes parts and labour and applies even if the head is not fitted by a VW dealer.


    Hi

    Thanks for your time and advice. 3k is hell lot of money what if we replace the engine which is available in 700 plus labour? or would I only need engine head to be replaced?
    Looking forward for advice.

    Thanks

    Sam
    2013 Golf 1.2 TSI

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