C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

mis fire right after start up

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Old Apr 14, 2007 | 12:44 AM
  #1  
94azvette's Avatar
94azvette
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From: Casa grande Arizona
Default mis fire right after start up

hey all havent posted in a long time, good to be back. i started to have a issue with my 94. after i start my car it seems to mis or back fire until the engine warm up. once the engine warms up it purrrs like a kitten but i cant figure out why this is happening. i have changed the plugs, wires, even cleaned my intake, thinking that it was lack of air flow or something to do with the fuel to air mixture, i even changed my fuel filter which was kind of a pain. any ideas would be appreciated.
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Old Apr 14, 2007 | 01:42 AM
  #2  
coupeguy2001's Avatar
coupeguy2001
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From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
Default misfire

Sounds like one of your injectors may be leaking.
Add a half can of Berryman's Chem tool and drive it 50 miles, then park it in your garage overnight and start it up the next morining.
You might also try Techron manufactured by Chevron Oil co. and you can get both at Auto Zone or Checker/kragen.
Some guys like Seafoam.
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Old Apr 14, 2007 | 02:17 AM
  #3  
94azvette's Avatar
94azvette
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From: Casa grande Arizona
Default

so when you say a injector is leaking that would be the reason why when it warms up and expands the leak would go away is this correct?

wouldnt it just be better to replace the injectors? where exactly would it be leaking from? is there a rubber seal?
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Old Apr 14, 2007 | 10:42 AM
  #4  
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vinnies87
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From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Default

yes and no,

seals, stuck pindle, carbon or junk...

up to you, but stay away from Accel injectors, ford has the best rep for injectors
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