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Old 08-14-2010, 07:18 PM   #1
Gfunk720
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2011 VW TDI Wagon

Default Just changed plugs, misfire and loss of power...

Guys,

This was my first plug change on a N/A subie, and I felt like it was super easy. Took me about 20 minutes, and everything went smooth. I've done dozens on turbo cars, but never with the wire on plug cars.

So, everything seemed to go fine. Revved the car in the driveway, and it worked fine. Took it for a ride, and as soon as I put load on it, it started to misfire and buck. Pulled it over immediately, and checked the connections. Pulled and re-attached one wire that looked like it might not have been completely on. CEL and Cruise shut off, and I though we solved it. Confirmed that they are the correct plugs as well


Shortly down the road, the car started to do the same thing under load. It's only at certain throttle positions, and typically under load.

1. Is there anything I should check for? The plug wires are pretty easy to make sure they are on the right plug.

2. Did I perhaps undertighten a plug? Or could I have got a bad plug?

Never had a bad plug out of the box before. I'd put the old ones back in, but I may have damage the electrode when taking one of them out.

TIA,
Gfunk
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Old 08-14-2010, 08:41 PM   #2
2.5GTLegacy
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Correct plugs?
Pre gap plugs?
Bad batch of plugs? ie hairline cracks?
and how did you remove the spark plug wires?
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Old 08-14-2010, 08:42 PM   #3
Subey03
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PSM

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i have helped tons of people w this one...same thing happened to me when i did my plugs....u probably cracked an insulator ..."the white part on the spark plug" <---- its made of porcelain.....get back to us...and this will only happen under load...im putting a billion taco's its this fer sher
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Old 08-14-2010, 08:48 PM   #4
RaceFaceXC
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2007 No YELLING
on the bus!

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can't wait for some taco's!
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Old 08-16-2010, 10:24 AM   #5
Gfunk720
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Subey- You owe us all tacos! I will PM you my address later...

Turns out one of the connectors inside the plug wire broke. When I pulled the plug off of the spark plug, the little metal connector came right out. The plug was fine, but was not firing due to the broken wire.

Going to pick up replacements soon. Maybe I pushed them too hard when putting em back on?
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Old 08-16-2010, 12:53 PM   #6
Subey03
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Quote:
Originally Posted by Gfunk720 View Post
Subey- You owe us all tacos! I will PM you my address later...

Turns out one of the connectors inside the plug wire broke. When I pulled the plug off of the spark plug, the little metal connector came right out. The plug was fine, but was not firing due to the broken wire.

Going to pick up replacements soon. Maybe I pushed them too hard when putting em back on?

the spring looking thing inside the coil pack right...?...well its the same thing ur spark was jumping...lol illl ship the tacos via fed ex
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Old 08-16-2010, 01:28 PM   #7
Bluefoton
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now with a HID retrofit

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In for the tacos
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