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Old 04-17-2014, 12:52 PM   #1
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I've recently gotten myself DW1000s...

Currently have Deadtime on TunerStudio (MS2e) at 1.62ms and .1 increments per volt in the settings.

The car runs well and keep steady AFR at cruise but idle jumps around all over the place depending on what seems to be based on voltage.
IE. Locked solid at 14.5 idle until my fan flips on/lights or anything to throw voltage off...it'll lean to 16-17 at idle and if voltage drops.

I know I sound like a complete N00b here (and I am)....but hoping for some spoon feeding.

For those interested...Fuel setup is as follows:
DW1000 Injectors
DW300 Pump
Rest of Fuel system is stock and damper removed.
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Old 04-17-2014, 01:04 PM   #2
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This doesn't sound like a fuel issue but rather....


You're still using the factory alternator, aren't you?
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Old 04-17-2014, 01:08 PM   #3
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Yes...factory alternator with 50k on it.

Rev built MSM Megasquirt ECU on my MSM.
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Old 04-17-2014, 01:16 PM   #4
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Sounds like it's time to tune your alternator output.
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Old 04-17-2014, 01:23 PM   #5
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Quote:
Originally Posted by concealer404 View Post
Sounds like it's time to tune your alternator output.
I'm going right ahead and assuming there is a spot for that in TunerStudio with a cute X-Y graph I can adjust tonight and it'll do something...
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Old 04-17-2014, 05:38 PM   #6
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Founds settings....readings are rock solid at about 14.1volts no matter what.

Settings look good
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Old 04-17-2014, 05:43 PM   #7
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Sure, but what is the voltage doing when you turn your lights on and off, a/c fan on/off, etc?

Alternator provides power. That's where your voltage drops come from. It'a the only direct link between your lights and your pump/injectors.

Might be worth going over your grounds with a fine toothed comb as well.
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Old 04-17-2014, 05:45 PM   #8
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Stays at 14.2v. Regardless. Alternator is doing exactly what it should.
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Old 04-18-2014, 01:25 PM   #9
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I was wrong. It's not rock solid....randomly going down hwy and voltage drops to 12.5v...then spikes to 18.5v... This is all according to tunerstudio but looking at the AFR jumping around accordingly...I believe it.

Turn car off completely...turn car on...everything back to 14.2v as if nothing happened.
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Old 04-18-2014, 01:33 PM   #10
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#NBLIFE

Time for NA8 alternator swap or something.
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