FlashPro unit won't datalog during startup

XSRCivic · Post by **XSRCivic** » Fri Dec 18, 2009 11:23 am

- FP-SI-US-10268
- FlashPro Manager ver 1.1.3.1
- 2007 Honda Civic Si (K20Z3)
- stock ecu

Pretty basic issue here... I attempted to capture a datalog during engine start but its not working anymore. The last time I successfully did this was about a month ago.

Here's the steps:
1. Plug in FlashPro
2. Turn key to ON position
3. FlashPro unit is powered now powered on, Press "Datalog" (datalog light begins blinking like it should)
4. Turn the key to start, motor cranks and starts but datalog stops

See the attached fpdl & calibration.

Any ideas?

Post by **Spunkster** » Fri Dec 18, 2009 12:10 pm

More than likely your battery voltage is too low and it is casusing it to disconnect when you crank the vehicle.

XSRCivic · Post by **XSRCivic** » Fri Dec 18, 2009 12:48 pm

the datalog above indicates my battery voltage to be 11.5 V. Is that not acceptable?

Post by **Spunkster** » Fri Dec 18, 2009 1:28 pm

That is not when cranking. During cranking it may drop well below what you see just sitting there.

VitViper · Post by **VitViper** » Sat Dec 19, 2009 7:44 pm

XSRCivic wrote:the datalog above indicates my battery voltage to be 11.5 V. Is that not acceptable?

Usually I'm at 12.2-12.5v when the key is in "on" but not cranking. When cranking I've been seeing 10.0v-10.5v. The one time it dropped below 10, my FPro datalogging got cut off.

Just expanding on what Spunkster has said.

XSRCivic · Post by **XSRCivic** » Sun Dec 20, 2009 5:09 pm

VitViper wrote:
XSRCivic wrote:the datalog above indicates my battery voltage to be 11.5 V. Is that not acceptable?
Usually I'm at 12.2-12.5v when the key is in "on" but not cranking. When cranking I've been seeing 10.0v-10.5v. The one time it dropped below 10, my FPro datalogging got cut off.

Just expanding on what Spunkster has said.

Yea I get you. Seems my voltage is lower then normal. Here's a datalog I took with the laptop. As you can see voltage during cranking ranges from 9.8-10.5. The lowest I noticed was 7.7 V but not continuous.

This startup wasn't as bad as say the car sitting out in the cold for a good 8-10 hours. I'll have to test it out again tomorrow after work to see the difference. Besides that, is this a good indication of a battery on its way out or is it in need of a good charge?

XSRCivic · Post by **XSRCivic** » Mon Dec 21, 2009 5:55 am

Here's another datalog from this morning.

Post by **Spunkster** » Mon Dec 21, 2009 11:36 am

it goes down to 8.7V

it's time for a new battery

XSRCivic · Post by **XSRCivic** » Mon Dec 21, 2009 8:33 pm

Stock battery = 2 years 10 months. It didn't quite crap out but it had to be on its way. Purchased and installed an Optima yellow top this afternoon.

FlashPro logs during startup again as it should and voltages look much better. I was also having an issue where my HIDs wouldn't come on, sometimes one or not at all. I would have to flick them on and off to make it work. I suspect it was also battery related.

Thanks for the help!