way-ward advance!

Audio, Electronics and Lighting questions and answers

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plohl
Racing Driver
Posts: 1922
Joined: Wed Oct 14, 2009 12:13 am
Vehicle: NA8
Location: Brisbane

way-ward advance!

Postby plohl » Sun Jul 22, 2012 10:47 pm

Hi,

I noticed something peculiar the other day whilst playing with the coolant temp enrichment with my ecu, so I took some logs and this is what I found.

Image
Ign Adv errors by plohl, on Flickr

So it turns out my ignition advance changes randomly at idle - haven't looked as any dynamic logs yet.

I checked all the compensations and couldn't find anything to suggest why it is changing. I have wired in a new connector for the CAS as the wires at the base of the other one were fk'd to say the least and tried my CAS out of my B6 engine ([plug]that is still for sale - see sig[/plug]) and it is still happening.

Anyone got any idea's as to what might be causing this? I am going to try and get a hold of an oscilloscope to see if i can see what the CAS tigger and home voltages are doing. Or is this normal and i should just not worry about it? The ecu is a haltech e6x - contemplating buying a new ecu for shits and giggles but not convinced on an MS and I am feeling exceptionally cheap.
Cheers,
plohl

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gslender
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Joined: Sat Feb 19, 2011 10:49 pm
Vehicle: NA6
Location: Brisbane, QLD

Re: way-ward advance!

Postby gslender » Sun Jul 22, 2012 11:15 pm

thats a common thing in ecus to use variable spark for idle control
MX5 91 NA6 LE completely stock and loving it!
MX5 92 NA8/ITBs Silver "aka Track Beeotch"

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plohl
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Posts: 1922
Joined: Wed Oct 14, 2009 12:13 am
Vehicle: NA8
Location: Brisbane

Re: way-ward advance!

Postby plohl » Sun Jul 22, 2012 11:53 pm

Yeah - i thought it might be that but the Idle control is off.

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Cheers,
plohl


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