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Old 04-25-2009, 10:13 AM   #1
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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
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Old 04-25-2009, 11:13 AM   #2
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what are the AFRs when this is happening?
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Old 04-25-2009, 11:24 AM   #3
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I didn't log at the time but I believe gauge showed around 10:1
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Old 04-25-2009, 11:29 AM   #4
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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.
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Old 04-25-2009, 11:47 AM   #5
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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
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Old 04-28-2009, 08:59 PM   #6
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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.
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Old 04-28-2009, 09:36 PM   #7
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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.
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Old 04-29-2009, 01:01 AM   #8
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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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