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Car will miss fire and code on cold start. Once it warms a little it runs prefect.

Tiny
LPRICE
  • MEMBER
  • 2000 VOLKSWAGEN JETTA
  • 103 MILES
Cleaned injectors, replace plugs and coil packs, check for vac. Links ect.
Monday, March 19th, 2012 AT 2:24 PM

9 Replies

Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
What code(s)?
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Monday, March 19th, 2012 AT 5:31 PM
Tiny
LPRICE
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The code is a misfire code on #3 cyl.
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Monday, March 19th, 2012 AT 8:08 PM
Tiny
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Check wiring to the coil pack. Swap the coil packs around. Check compression. Check fuel pressure during cold start.
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Monday, March 19th, 2012 AT 8:32 PM
Tiny
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Did all that compression good
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Monday, March 19th, 2012 AT 10:34 PM
Tiny
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What about fuel pressure? Have you checked the injector to see if it's pulsing properly?
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Monday, March 19th, 2012 AT 11:18 PM
Tiny
LPRICE
  • MEMBER
  • 5 POSTS
Replace fuel filter and # 3 injector and all is dong well. The presser is good. Just thought you have heard of this problem before and found some off the wall thing going on with it. It just does it at cold start. With in a few mins. It clears out and run like new.
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Tuesday, March 20th, 2012 AT 1:16 AM
Tiny
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Nope. What size engine does it have?
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Tuesday, March 20th, 2012 AT 2:43 AM
Tiny
LPRICE
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1.8t
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Tuesday, March 20th, 2012 AT 10:33 AM
Tiny
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One idea would be to take it to a shop that has the special VW scanner and either scans live data for free, or doesn't charge much to do so. Live data will show what's going on when the code is set.

You said you'd swapped the coil packs around. What happened when you did that? Did the misfire code follow the coil pack, or stay on #3?

Have you checked the injectors and coils with a noid light to watch how they're pulsed?
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Tuesday, March 20th, 2012 AT 11:04 PM

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