Question about 2003 Volkswagen Passat

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2003 Passat 4 Cylinder 1.8L Turbo wagon: misfire codes for all cylinders

Got an engine light. Engine sounded a little rough during idle but nothing serious. Had codes read at Advance Auto. Showed all cylinders misfiring. I replaced all spark plugs with proper gap. Also bought a new coil pack and put it in all four positions without any change in performance. Absolutely nothing changed after all this. Engine light still on. Still a little rough at idle and seems to be a little less powerful when accelerating. What should I try next?

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Bill George

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  • Volkswagen Master
  • 2,517 Answers

Compression check may tell you something.

Posted on Jun 10, 2017

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5 Related Answers

fusster

  • 65 Answers

SOURCE: Firefire in cylinder four / random misfires

Its not likley to be an injector fault.the air mass meter is far more common.if you unplug it it defaults to a average value and should improve the way it runs if that is the problem.

Posted on May 21, 2009

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Anonymous

  • 167 Answers

SOURCE: 2000 passat ATQ, normally aspirated. Misfire #5.

Swap #5 injector with another one and see if the miss moves .
If the miss moves then the injector is faulty.
If the miss doesn't move do a compression test and get back to me .
Cheers
George

Posted on Jul 03, 2009

Michael Stephens

  • 119 Answers

SOURCE: MISFIRING ON CYLINDER 1 VW POLO 1.4 3CYLINDER

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

alicantecoli

Colin Stickland

  • 22485 Answers

SOURCE: 1997 Jetta GLX VR6 giving

pull the multi plug connectors off the coil pack and check the connections ,and then rub the pins with a soft lead pencil and see what happens

Posted on Dec 12, 2010

dttech

dttech

  • 4803 Answers

SOURCE: 1999 VW Passat 1.8 turbo Code #3 cylinder 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.

Posted on Feb 27, 2011

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My engine is on sometimes and then off. When it is on sometimes it blinks ?????? Check engine light ??????
The flashing light is meant to alert you that you may have a misfire in your engine that will cause catalytic converter damage if you leave the problem unresolved. Replacing a catalytic converter can be costly, so have the engine checked as soon as possible by a certified mechanic.
Don't go to advance auto parts .

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I have 2003 ford focus 2.0 SOHC SPI with a bad missfire


Yup, been there, done that. Found it was a bad injector. Replaced that one injector the test showed and runs great now. Check engine light should be on though because of this problem. The test will show you which cylinder is misfiring and that is the injector you change. My test showed #5 cylinder. The last # in the code read.

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3rd cylinder is misfiring. how to fix?


For engine misfiring problem check the help links mentioned below. Click the link below to go through the troubleshooting procedure :---- Engine misses and truck jumps? Hard to down shift? Issue with high gear only? http://technoanswers.blogspot.in/2012/02/engine-miss-and-truck-jumps-hard-to.html

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Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Engine Misfire codes for car?


http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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Oil on spark plugs and car misfires?

http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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This will help.

Thanks.

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My check engine light is flashing, the car runs rough until I get up to about 30mph and it is running through gas like crazy


Sounds like you have cylinder misfire. Any of the large auto parts stores can run an OBDII check and tell you which cylinder is misfiring (not firing). The engine is running with one cylinder out causing the rough idle. The faster the car goes the less perceptible the misfire is. That is why at 30mph the car seems to run smooth.

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I have an 02 Chevy Trailblazer & the Service Engine Soon light is on & flashes while accelerating. Also has a very rough idle. Any idea what the problem may be? Thanks


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Rough idle & check engine light on , but runs fine when giving it gas


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