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Definitely think misfire but no engine light

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Old Jun 12, 2016 | 04:02 PM
  #1  
3vi1john's Avatar
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Default Definitely think misfire but no engine light

So i had my vehicle diagnosed at the shop for misfiring. No engine lights. I have non oem version 1 coil packs. I purchased version 2 coil packs from Audi for 130 dollars and I am still running into misfiring after the engine is warmed all the way up. I replaced the plugs a couple of months ago and the current plugs are bosch oem pre gapped at .032. Should I swap the plugs out as well to see what I get? What else could this be?
 
Old Jun 12, 2016 | 08:36 PM
  #2  
imaudi5000's Avatar
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From: syracuse
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misfires suck, as you know. long story short, i had a misfire that turned out to be a burnt exhaust valve. hopefully thats not the case for you, i did get a cel thou.
try fuel injector cleaner or dry gas. did ya put questionable gas in lately? checked/changed the fuel filter? intake track clean and sealed properly?
 
Old Jun 13, 2016 | 10:43 AM
  #3  
KingWulfgar's Avatar
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How many miles? Engine type? Coils, plugs, injectors, in that order. Since you just replaced the coils, pull the plugs and check them. If one or more look fouled up, you could have a leaky valve cover gasket. If you have to tear it down to get to the injectors, it's probably worth doing a carbon cleaning while you're in there. These direct injection engines really get fouled up inside.

I've had intermittent misfires that didn't throw a code at first, but eventually it would.
 
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