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Vw passat 2009 misfire under load - Cars & Trucks

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: misfiring passat 1.9 tdi when

Spark plugs in a TDI?

Posted on Aug 10, 2008

  • 119 Answers

SOURCE: 1999 Passat bogs under load and seems to be

very unlikely to be fuel filter. misfires on petrol engines are usual down to the ignition system,possibly Plugs or leads if fitted. plugs should be replaced every 40,000 miles, not an expensive item either.

Posted on Feb 24, 2010

Testimonial: "Yep. You were right. Turned out to be two bad coil packs (#s 2 and 4 cylinders). Thanks."

drsinister69
  • 2317 Answers

SOURCE: 2003 vw passat wagen 4 motion 6 cl i have a #1 cl

Check the spark plug for that cylinder, the wire and coil. Also check for any vacuum leaks around that cylinder. See my "How To" on finding a vacuum leak.

Posted on Mar 13, 2010

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

llearntoearn
  • 6 Answers

SOURCE: i've a 1999 VW passat that misfires and has no power.any clues?

Could use some more data such as:

All the time?
Only hot?
Only when first starts?
Only when wet?
Did it start after after buying cheap gas or adding gas from an old gas can?
How long since last tune up?


I would suspect bad ign wire leaking high voltage or it is not getting to the spark plug OR a fouled plug. Sometimes you can hear the spark SNAPPING to ground or see it at night. Often you can get bad wires to show up by spraying them with a mist of water from an old spray bottle and uptting the car in gear with light acelleration. Make SURE to NOT stand in front of the car while somone is jazzing the gas!!!

Been a while since I have worked on a VW but most often it is plugs and wires.


Hope this helped,
Ken C

Broken vaccume lines could also give you a skip and poor power in some situations.

Posted on Apr 30, 2012

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The vw ngk plugs are pre gapped. If you have a misfire it's more likely either a coil, bad fuel, or a faulty ecm.

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1999 VW Passat Turbo 1.8 has ignition wires and coils. Are you having misfire issues? It could also be the injectors. -------------------------------------------------------------------------------
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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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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.

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Misfiring passat 1.9 tdi when under load from 50 mph, foot to the floor. cured only by easing off throttle. Also occasion rattle when under load through 2nd and 3rd gear when accelerating under load. 2005...


Find the bad sparkplug or wire; or miswired plugs; or distributor foolishness (carbon buildup, dirt, cracked component in there at bottom....)  Maybe there's a leak or sediment in the F/I vacuum tee someplace that would cause funky load artifacts like that misfire, if the plugs all look honest.

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