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Cold Start Issues

 
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Leejo2005
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Joined: 12 Jul 2009
Posts: 466
Location: Kennewick
PostPosted: Tue Jan 03, 2012 10:32 am    Post subject: Cold Start Issues Reply with quote
For the last month or so the Firebird has been running super rich after a cold-start. It pegs the wideband gauge at 10:1 and barely runs. As it warms up it slowly comes up to about 12:1 then snaps into closed loop 14.7-15:1 and runs fine. If the car has been started within about the last 6 hours it doesn't do it.

I hooked up the laptop and I didn't see any weird sensor readings. I first suspected CTS but it was right on.

I'm running $6E ANZA on my car with cold-start injector delete kit. Vacuum at 20" at 900rpm fuel pressure at 43ish.

I'm puzzled with this right now. I haven't messed with anything on the engine or tune for a month or two before it started acting up.
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