"Slow" start

[MCTeeJ]

Odd occurance happened today. Car wasn't fully warmed up but wasn't dead cold either (temp gauge was just under the first line from the bottom) and it performed an odd startup. Car usually shoots right up to 1500 rpm and stays there for the usual 30-45 seconds, but this time it quietly went to normal idle speed, then shot up to 1500rpm after about a second, as if there was some delay.

If I'm being paranoid that's fine, I've owned the car for almost 4 years now and have replaced the plugs once, all 4 coil packs, and all 4 DI due to a misfire issue about a year ago. I just wanted to gather some info/opinions on this. Car is on e85 and has the correct cold cranking tables in the tune. My best guess is maybe I caught it at an odd point between fueling tables but I don't really know.

Thanks in advance

[DarkPira7e]

For what it's worth, my car does this when it's cold out. Like below 25 degrees F. It's as-if the car is deliberating on what process to follow.

It likely doesn't apply here, but hardware can be "cold bugged" and have small hiccups. I've only seen this in computer hardware specifically ( cooling a computer with dry ice) but I suspect when any hardware responsible for submitting and reacting, it can be affected by cold. I don't know why it would do this when the car hadn't been sitting for a long period of time..

[MCTeeJ]

Originally Posted by DarkPira7e

For what it's worth, my car does this when it's cold out. Like below 25 degrees F. It's as-if the car is deliberating on what process to follow.

It likely doesn't apply here, but hardware can be "cold bugged" and have small hiccups. I've only seen this in computer hardware specifically ( cooling a computer with dry ice) but I suspect when any hardware responsible for submitting and reacting, it can be affected by cold. I don't know why it would do this when the car hadn't been sitting for a long period of time..

Thanks for your input regardless. Yeah it was only 74*F when it happened, and the car hadn't been sitting long. I just had it sit outside for the same 2 hour time period, in the same weather, and it started right up without that delay. I've been told anything involving machines/electronics is entitled to a fluke now and again lol

[DarkPira7e]

Originally Posted by MCTeeJ

Thanks for your input regardless. Yeah it was only 74*F when it happened, and the car hadn't been sitting long. I just had it sit outside for the same 2 hour time period, in the same weather, and it started right up without that delay. I've been told anything involving machines/electronics is entitled to a fluke now and again lol

Yeah at those temps, my explanation has no footing. It may have been at the cusp of between " warm enough" and "TOO DAMN COLD" where the ECU determines a warm-up procedure is necessary.

[humfrz]

Oh, I reckon your car just had a minor CPU fart.

I wouldn't worry about it unless it continues.


humfrz

[MCTeeJ]

Originally Posted by humfrz

Oh, I reckon your car just had a minor CPU fart.

I wouldn't worry about it unless it continues.


humfrz

had two different starts later today in the same conditions. 2 hours or more off and not completely cold. Started up fine both times.