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So I had my new OBS reader hooked up to my car last night and was checking out the live data from the PCM and noticed that the spark advance was different than any other gm ive ever seen.
At idle its at -5 degrees and at WOT it hit -40 degrees.
Is this normal for our cars? If not, what would cause this.
Most new GM's I've seen have a spark advance of around 30-40 degrees at WOT A negeative value that high doesnt make sense to me.
Representin' Team Red In The North
Red '96 Pontiac Firebird "Smokeshow" 3800, M5, Far From Stock!!
negative would be spark retard, not spark advance. Thats weird its that high tho
Juiced Rally Red 98 A4<br /><br />Way too much to list....<br /><br /> <a href=\"http://www.cardomain.com/ride/2263415\" target=\"_blank\">http://www.cardomain.com/ride/2263415</a>
So I had my new OBS reader hooked up to my car last night and was checking out the live data from the PCM and noticed that the spark advance was different than any other gm ive ever seen.
At idle its at -5 degrees and at WOT it hit -40 degrees.
Is this normal for our cars? If not, what would cause this.
Most new GM's I've seen have a spark advance of around 30-40 degrees at WOT A negeative value that high doesnt make sense to me.
Your probably just seeing the Torque Management part of the tune. You are probably seeing this when you are shifting and TM decreases timing? Am I right? There are ALOT of tables in the tune that will decrease timing. Its hard to tell from what little description you have given
Originally posted by Kidcamaro98
negative would be spark retard, not spark advance. Thats weird its that high tho
high? you mean that negative?
2k2 camaro, K&N, SLP whisper lid, Konis, AEM, HP Tuners, Angel eyes/Halos, CF SS ram air hood, 4.10s, Zexel Torsen, UMI SFCs, CrossFire, BFGs, Gatorback, Catco, Flows, and TLC! DONT feed the Trolls!
yes in the tables you do spark advancement by subtrating the numbers....when your running a scan and pull up the charts it will tell you your advancement.
Juiced Rally Red 98 A4<br /><br />Way too much to list....<br /><br /> <a href=\"http://www.cardomain.com/ride/2263415\" target=\"_blank\">http://www.cardomain.com/ride/2263415</a>
Well, I dont know how much more dtail I can give. I'm seeing a constant -5 degrees Spark Advance whel at idle, and btween -35 and -40 degrees at WOT in our out of gears (5 speed).
Driving around town casually, I'm seeing around -25 degrees.
Representin' Team Red In The North
Red '96 Pontiac Firebird "Smokeshow" 3800, M5, Far From Stock!!
I never siad that. I just thought it was odd the according to my computer its retarding the spark by 40 degrees. Just wondering if I had some possible computer problem, or if it was completly normal with these engines.
Representin' Team Red In The North
Red '96 Pontiac Firebird "Smokeshow" 3800, M5, Far From Stock!!
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