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Car doesn't want to stay running-rpms drop and it dies...weird problem

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Old Apr 25, 2009 | 09:13 AM
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Default Car doesn't want to stay running-rpms drop and it dies...weird problem

So my car has been running fine for a month or so. I left work, drove for 10 minutes, stopped, ran into restaurant, 10 minutes later came out and cranked it but the car just wanted to drop to 0 rpm and die unless I gave it gas to keep it running. I had a 15 minute drive home and if I let my foot off the gas in neutral the car would just drop rpms to 0 and die. Yesterday was a warmer day-about 85 where it hasn't really gotten above 75 this year so don't know if this could be a factor or not. Also, I've pretty much driven straight from work to home or vice versa-never turned the car off while warm and try to restart it so maybe that's a factor. I've done some searching and seems there is a heat soak issue with the AIT, but mine is located in a pretty good spot where this shouldn't be an issue according to what I'm reading.

So I get the car home and into the garage and then it idled fine.

Any ideas? I do have my idle set fairly low-about 900rpm. Also, I'm running standalone with the idle mod
Old Apr 25, 2009 | 10:13 AM
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what are the AFRs when this is happening?
Old Apr 25, 2009 | 10:24 AM
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I didn't log at the time but I believe gauge showed around 10:1
Old Apr 25, 2009 | 10:29 AM
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what does you coolant based air density table look like? when you heat soak you need to add fuel else it leans out.
Old Apr 25, 2009 | 10:47 AM
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It has 100% all the way down. ok, I'll do some more research on heat soak and how to correct the fuel if that's what I'm experiencing and check back. thanks
Old Apr 28, 2009 | 07:59 PM
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ok, so I changed the Coolant Corrected Air Density settings to the following:
Temp: 50 55 60 65 70 75 102
Offset: 105 110 115 119 124 129 150

I also bumped my idle up to 1000 rpm, so this might have contributed but now it runs fine and doesn't want to die on me like before...I am noticing a little hesitation when pressing the accelerator-maybe I need to mess with the settings some but it's much better now.
Old Apr 28, 2009 | 08:36 PM
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I think I may be running into similar problems, summer just hit Atlanta and my car was stuck in 285 traffic for a good half an hour on a very hot day after being on the road for a good hour or so. And then it started dropping revs all the way.
Old Apr 29, 2009 | 12:01 AM
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Your issues sound exactly like what ZX-Tex and I are facing on the Adaptronics. Won't idle after shutdown for a few minutes and gets better after some air passes. The funny thing is my IAT's aren't bad after shutdown - maybe 5* up. Sensor is mounted in the passenger fender so outside the engine bay.
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