Question about 2002 Volkswagen Golf

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MISFIRING ON CYLINDER 1 VW POLO 1.4 3CYLINDER

MISFIRING ON CYLINDER 1, LOW COMPRESSION,VW POLO 2005,1.4cc 3 CYLINDER ENGINE ,REPLACE PLUGS & COIL PACKS,
STILL THE SAME, ANY HELP PLEASE

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I have changed a few cylinder heads under warranty for this type of problem. The exhaust valve guides wear, this causes the exhaust valve to seat badly, giving low compression. if one cylinder compresion reading is more than about 50 psi below the others, then this warrants head removal. It is quite a job, due to the fact that the camshft id chain driven. If you are up for it then once the head is removed, poor liquid into the exhaust ports and see if it leaks out through any of the exhaust valves.

Posted on Jul 23, 2009

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VAG si engines with the c.o.p ( coil on plug ) suffer with the coil packs as they are sat in a place where cooling is not good causing the voltage amplifier internally in the coil pack to go down causing misfire it is advised to change all of them at the same time. if you have changed these to no joy and you are saying you have low compression then you will have to take the cylinder head off and check the valve seats and valve condition then send the head off for skimming at an engineering company and ask for a pressure test on the head to check for crack in the head if this shows no imperfections then refit the cylinder head with new gaskets and cam belt kit including the water pump and try the engine running again if it is still missing and low compression then you will most likely looking at piston rings if you are doing the work your self it is possible to do pistons with engine in situe but I would recommend removing the engine and working on it on a bench to allow easier access again if you are replacing the rings then you should do all pistons in the engine vag part are normally cheap piston rings will be main dealer only I hope this help and good luck

Posted on Aug 24, 2013

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I had same problem but changed coil pack and now works fine mine also was misfiring on cylinder 1 too

Posted on Nov 13, 2012

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There maybe something wrong in your engine block thats why its misfiring on 1. have it check by professionals.

Posted on Jul 03, 2009

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1 Answer

Misfiring on cylinder #3


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if it's a quad four then crack around the ignition coil. there is 2 coils like 1-4 coil and 2-3 coil
first check spark plug color or foul of gaz
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vw polo 1.2 3 cylinder engines have a problem with the valves being to long and once they wear into the valve seats they use up the reserve travel in the hydrolic tappets and remain open when the valve lenthens when hot causeing missfires but shrink when engine is switched or causing a tempery cure

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05 Ford Escape, coils #3 & #4 not firing. We've replaced the battery, spark plugs, alternator, coil packs, & pcm. Had pcm reflashed. Garage said it had to be coil packs, but just replaced coil packs 3


Check engine light on ? Code's ? What engine ? 2.3 l 4cylinder or 3.ol v-6 This vehicle has coil on plug ignition system , not coil packs ! a coil per cylinder . If new coils an still has no spark , has no B+ voltage to the coil or the PCM isn't controlling them . Without testing i'd only be guessing as to the problem .If the repair shop you had it to can only say it had to be the coils , I'd find another shop to take it to !
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1 Answer

99 pontiac grand prix that is still mis firing even after we changed plugs and wires, not sure what to do now please help


Misfires can be caused by several things including all the parts you have already replaced as well as faulty ignition coils, faulty injectors, vacuum leaks and engine mechanical problems such as low compression.
With the proper equipment, injector operation can be verified by performing injector balance tests, where the operation of the injectors in the misfiring cylinders is compared to the other cylinders that are not misfiring.
Also, engine mechanical failures such as bad piston rings or leaking/burnt valves can be diagnosed with a simple compression test.
An easy (and very inexpensive ) way to verify ignition coil operation is to swap the coil from the misfiring cylinder(s) with the coil(s) from the cylinder(s) that is(are) not misfiring. Then clear the fault codes and drive the vehicle. If the same cylinders are still misfiring, the coil is not the problem. If the misfire moves to the cylinder that you swapped with - replace the coil.
Sometimes, injectors can also be tested this way, but on most GM V-6 or V-8 engines, this is not practical due to the labor involved in "swapping" injectors.

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1 Answer

1999 VW Passat 1.8 turbo Code #3 cylinder misfire. Replaced coil and all plugs, still have misfire...???


Coils and plugs are not the only things that can cause misfires. Misfires can be caused by vacuum leaks, low compression, faulty fuel injectors, clogged EGR ports (on vehicles with individual ports for each cylinder), blown head gaskets, burned valves...you can spend a LOT of money on parts by just going in and replacing things without diagnosing WHY the cylinder is misfiring.

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have you isolated which cylinder is misfiring?
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1 Answer

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100% sure it shows one of your cylinder compression is weak, please do a compression test to isolate the problem and get the head/pistons checked . This is a known problem with VW/Skoda 1.2 3 cylinder mills..

Apr 27, 2009 | 2002 Volkswagen Golf

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