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Comptech SC running lean all of a sudden

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Old Feb 24, 2006 | 06:09 PM
  #1  
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Default Comptech SC running lean all of a sudden

Ive had my S/C for over 2 years now not one issue. Currently Im running on 7psi with the Emanage untuned with just the map clamp with colder plugs. Since its winter, I havent driven the car much.
Last month I noticed like a bell ringing sound in boost so I backed off. Its been cold so I havent driven her since now. Today I tried again and same thing. I can only think that its the engine knocking.
I have just a basic a/f gauge for now. The Uego is sitting in the tunk waiting for a warm day. Ive had the car dynoed and tuned enough to know about where my a/f on my gauge should about be to be safe. Ive noticed that its not even going into full richness at full throttle.
My conclusion is that the cars running very lean all of a sudden. Anyone have any ideas on what I can check for the issue?

The only changes since when the car ran fine until now was a test pipe and a new battery. I dont think the Emanage would have lost its throttle position settings or anything with loss of power.

I need some ideas.
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Old Feb 25, 2006 | 09:44 AM
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Im going to try reloading my tuned very rich emanage settings to see what happens, but if anyone has any suggestions please post.
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Old Feb 26, 2006 | 09:53 PM
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Did you try resetting the ECU?
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Old Feb 26, 2006 | 11:44 PM
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[QUOTE=revhi,Feb 24 2006, 07:09 PM]Ive had my S/C for over 2 years now not one issue.
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Old Feb 27, 2006 | 04:28 PM
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Ill tey the ECU, but the ecu resets byitself every cycle though doesnt it?

Im thinking more along the lines the FPR isnt adding more fuel when it sees boost.
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Old Feb 27, 2006 | 08:14 PM
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Jackson, since colder air is denser, is it possible that you're just running so much more air through now? Perhaps the lessened back pressure(from cat removal) is contributing to this as well.
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Old Feb 27, 2006 | 10:06 PM
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The ECU doesn't reset, it reprograms its parameters and adjusts itself. If you've made any significant mods since you got that tune, that might just be the cause of it.
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Old Mar 1, 2006 | 09:03 AM
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if your car is running lean your not goin to here any noise, its just goin to go boom.. its prob he blower whinning from lack of use lately. the bearings in there n stuff
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Old Mar 1, 2006 | 05:17 PM
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Might be right about the cold, Ive been trying to load my tuned super rich settings back in and see. Anyone remember how to load a saved emanage map? Is it real time or do you have to export?
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