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

please help 84 problems

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Old May 22, 2004 | 08:36 AM
  #1  
da747's Avatar
da747
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From: Watertown CT
Default please help 84 problems

my o rings have been leaking the last few years, so wednesday i replaced the old original injectors with new ones and new o rings, i started it and it idled beautifully. i went to take off and it didnt want to come off idle, just wanted to die. i looked inside the air cleaner and saw that both choke flaps were closing with the engine hot as soon as i started it. i disconnected both vacuum lines so the chokes would stay open and it again started and idled beautifully. i tried to take off again and it went up my street great... then as soon as i turned on the main road, it went through first, 2nd and third fine, then as soon as i let off in fourth, it started to chug and skip badly. it couldnt even maintain speed so i pulled over and turned around. again, it accelerated well, but as soon as i got to fourth and backed off just to maintain speed it started chugging and missing like crazy like on 4 cylinders. please help ive put crazy money into it this year trying to make it run well, want to use it this summer. :nonod:
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Old May 22, 2004 | 10:39 AM
  #2  
rick lambert's Avatar
rick lambert
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From: seattle WA
Default Re: please help 84 problems (da747)

When was the last time you changed your fuel filter? Have you checked your fuel pressure? Have you checked for vacumn leaks? :seeya
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Old May 22, 2004 | 02:37 PM
  #3  
CFI-EFI's Avatar
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From: The Top of Utah
Default Re: please help 84 problems (da747)

:iagree: It sounds like it's running out of gas. It WILL get worse. The flapper (thermac) doors may have the vacuum hooked up to an incorrect port.

RACE ON!!!


[Modified by CFI-EFI, 12:40 PM 5/22/2004]
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Old May 22, 2004 | 07:47 PM
  #4  
da747's Avatar
da747
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From: Watertown CT
Default Re: please help 84 problems (CFI-EFI)

i changed the fuel filter last weekend. i havent measured the fuel pressure, but i dont see how it could accelerate fine, but cut out at part throttle. maybe theres a bad connection at the fuel pump and sometimes its shutting off?
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