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High boost misfire. Help

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Old Jul 11, 2012 | 05:46 PM
  #41  
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well, if y correct plugs would show up i'll start there. i hope thats all it is though.
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Old Jul 11, 2012 | 06:04 PM
  #42  
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Originally Posted by TURBHOE
correct, but if its not making power the the injector won't need to spray in mor fuel. kinda hang if you will.
Fuel is a component of airflow and RPM, if RPM goes up and Boost stays the same then fuel demand will go up as well. It can't make more power if the injector doesn't spray in more fuel. If I recall you are 2bar, so at WO the only thing your injectors care about is RPM and KPA. Regardless of weather or not the spark is good enough the PCM will command a certain Pulse width at whatever RPM/KPA you are at. If the spark is **** then it will be Rich due to un burnt fuel.
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Old Jul 12, 2012 | 04:19 AM
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I'm hoping it's just the Plugs. I ordered them Tuesday but the wrong ones came in. They ordered es not ef. So I reordered them yesterday. Suppose to be in today so I can swap them out. We shall see.
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Old Jul 12, 2012 | 04:20 AM
  #44  
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Oh and I found my config for logging boost, Afr and what not too. So now I can log the damn thing.
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Old Jul 12, 2012 | 07:01 AM
  #45  
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What are you using for a boost config? I log kpa for tuning and boost just for fun.
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Old Jul 12, 2012 | 07:37 AM
  #46  
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Here's me...

..but I have seen dying coil packs do this more times than I want to remember. There have been two separate occasions on the rollers where torque just hits a certain level and lingers or falls off because the coils couldn't keep up. Lot of good suggestions here, but that's always one to consider.
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Old Jul 12, 2012 | 12:31 PM
  #47  
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Originally Posted by 03sierraslt
Fuel is a component of airflow and RPM, if RPM goes up and Boost stays the same then fuel demand will go up as well. It can't make more power if the injector doesn't spray in more fuel. If I recall you are 2bar, so at WO the only thing your injectors care about is RPM and KPA. Regardless of weather or not the spark is good enough the PCM will command a certain Pulse width at whatever RPM/KPA you are at. If the spark is **** then it will be Rich due to un burnt fuel.
well, i didn't get to log and see what boost was actual boost was doing. i usually keep my config open to 2bar and ngk wide band also the one to compare comanded afr to actual afr. along with knock and timming. but some reason (me not paying attention) it was on a stock config. but i didn't notice iat's seemed to be pretty high for cruising down the highway prior to wot. something was just not going together correctly. i'll figure it out after i swap plugs. i may see about my warranty on miy wires and swap them out too.
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Old Jul 12, 2012 | 12:46 PM
  #48  
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What kind of wires do you have?
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Old Jul 12, 2012 | 01:53 PM
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advanced auto parts high temp wires. lol my stockers were so rotted the fell apart.
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Old Jul 12, 2012 | 01:57 PM
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Just wondered when you said they had a warranty.
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