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Hi guy's working things out preaty good here the only trhing that I have to figure out now is why my 96 Sentra is so cold blooded? I believe that there must be a boarder line problem with my fuel inrichment on start up?? Is there a cold start sensor? If so what is the value of this senso supposed to be? I have no codes on it but If it is startring to get out of wack could this be causing my problem? Or is there somthing else to check?
 

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With the GA16DE, I think this is how it works. Coolant temp sensor relays the coolant temp to the ecu, if its a cold start then the ecu relays the info to the IACV (Idle Air Control Valve), which opens for a high idle (extra fuel itself does not cause higher idle), then the oxygen sensor tells the ecu to adjust fuel ratio/amount.

I'd start with cleaning the IAVC if I were you, there's a nice write-up in this forum, just do a search.

Your theromostat may be funky aswell. Try to manually pull the codes (that procedure is stickied), just in case your Check Engine Light is busted.
 
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