LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Closed loop....then dies!!!

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Old Oct 27, 2005 | 01:42 PM
  #31  
turbo_Z's Avatar
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From: Kansas
Re: Closed loop....then dies!!!

The opti fires the injectors and the plugs so if the PCM loses 1 of the 2 signals then the motor is gonna stall out. Did you ever try the old paperclip trick to see what codes come up?
Old Oct 27, 2005 | 02:24 PM
  #32  
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Re: Closed loop....then dies!!!

Yep.

Not jumping on you or anyting, but I have mentioned a couple times already that no codes are being thrown. I checked it and could NOT believe that "12" kept flashing over and over and over!
Old Oct 27, 2005 | 02:44 PM
  #33  
Alvin@pcmforless.com's Avatar
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From: Charlotte, NC
Re: Closed loop....then dies!!!

i would put a coil on it first.

They are cheap... i've even got a few laying around.

When they get hot you can sperate a weak contact in the inductor. Hit a bump and bam.. its off and your not running any more

PS.. you plan on going to the track tonight? I think I finally got a belt to fit half way decent.. I also got some really nice looking heat wrap around my aftercooler..
Old Oct 27, 2005 | 02:46 PM
  #34  
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Re: Closed loop....then dies!!!

I have already put a coil and ICM on it.


Yeah, I'll be there, but not in my Camaro!
Old Oct 27, 2005 | 02:51 PM
  #35  
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From: Charlotte, NC
Re: Closed loop....then dies!!!

only 2 things left then.. optispark or opti harness...

awesome.. I hope it ain't so crowded and I can pull off a good run or two.
Old Nov 20, 2005 | 05:36 PM
  #36  
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Re: Closed loop....then dies!!!

UPDATE!!!!!!!!

I changed the opti harness and the car hasn't missed a beat!!



Runs different than it ever has before. Now when I start it up, it will idle sorta high (1000-1200) then settle down after about 20 seconds to 850 or so!! It has NEVER done that....as far as I can remember.



It also starts ALOT easier now!!
Old Nov 21, 2005 | 08:43 PM
  #37  
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From: Aurora CO
Re: Closed loop....then dies!!!

Where did you get the opti harness? My cars doing the EXACT same thing.
Old Nov 21, 2005 | 09:09 PM
  #38  
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Re: Closed loop....then dies!!!

I have another LT1 car that I stole it from. I hear that it is over 100 buck for the damn thing!
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