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

Open/Closed Loop idle issues (Videos)

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Old Apr 28, 2013 | 02:27 PM
  #1  
moonscar's Avatar
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Open/Closed Loop idle issues (Videos)

So my car idles pretty hard before it enters closed loop. Sometimes it can drop as low as 300 rps. Low enough to stall, as the video shows

Here is a open loop video:
VID_20130426_185119_zpsa3d193a2.mp4 Video by anonymousperson4life | Photobucket

Here is a closed loop video:
VID_20130426_191504_zps30b92f0f.mp4 Video by anonymousperson4life | Photobucket


Would there be anything obvious to you that would cause this issues? Once warmed up and it switches into closed loop the car is a dream. It just sucks waiting for it to warm up to switch over. Makes 1/4 mile tracks runs hard to do if your car sits in the pit too long
Old Apr 28, 2013 | 02:38 PM
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Re: Open/Closed Loop idle issues (Videos)

Couple things.... need more info - we can see it's a 4th Gen Camaro, apparently a Z28, but what year? I'm guessing it's an LT1, but I could be wrong. What modifications? Doesn't quite sound like a stock cam. If it's not stock, list the mods. "Signature" field is useful for that info.

And "Drivetrain" is for trans and rear axle topics, so let's move this to the correct engine tech forum, once you identify the engine.
Old Apr 28, 2013 | 07:28 PM
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Re: Open/Closed Loop idle issues (Videos)

dang. i was hoping you would not need that info. here comes the challenging part

lt1 with lt4 heads and hotcam
powerdyne 6lb boost supercharger

also sorry about the wrong thread. thought i was in engines
Old Apr 28, 2013 | 10:51 PM
  #4  
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Re: Open/Closed Loop idle issues (Videos)

OK.... let's move this to LT1 Based Engine Tech".

When you bolted the LT4 heads on, what intake manifold did you use?
Old May 3, 2013 | 04:20 PM
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Re: Open/Closed Loop idle issues (Videos)

Originally Posted by Injuneer
OK.... let's move this to LT1 Based Engine Tech".

When you bolted the LT4 heads on, what intake manifold did you use?
It's the lt4 intake as well. I don't think the lt1 would have fit anyway
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