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Autotap readings. Good or Bad?

 
Old 02-03-2002, 09:41 AM
  #1  
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Default Autotap readings. Good or Bad?

I took these readings:
Run 1
B1S1=.875
B1S2=.905
B2S1=.845
B2S2=.905
KR=3.6 Deg
Timing=13 Degrees

Run 2
B1S1=.815
B1S2=.820
B2S1=.740
B2S2=.870
KR=4.0 Deg
Timing=12.5 Degrees
Trans oil Temp=156
MAf Air flow Rate=45.37lb/min

Run 3

B1S1=.915
B1S2=.930
B2S1=.790
B2S2=.950
KR=1.8 Deg
Timing=15 Degrees
Trans oil Temp=169
MAf Air flow Rate=40.53lb/min

These readings were takin with the wrong plugs NKG-TR55 and a very loose plug.

I just changed to the correct plugs NGK-TR6. I have not done anymore readings as of yet.

Could the loose plug cause KR?

They look pretty wackey to me?

Thanks Jason

[ February 06, 2002: Message edited by: superchargedZ ]</p>
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Old 02-06-2002, 01:23 PM
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Default Re: Autotap readings. Good or Bad?

uhm I agree it looks lean based on guessing off the o2's but I assume by your handle you have a blower on the car? If so you certainly don't want 25 degrees of advance.

they probably set you up with 16-17 of advance and once you lose the KR I bet thats what you see.

changing the plugs is a good thing but you need to get on a wideband and see how lean you are and then fatten it up accordingly.
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Old 02-06-2002, 01:26 PM
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Default Re: Autotap readings. Good or Bad?

No need to log B1S2 or B2S2 either. These are your rear O2's.
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Old 02-06-2002, 01:26 PM
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Default Re: Autotap readings. Good or Bad?

MAf Air flow Rate=40.53lb/min at what fuel trim cell(s) ?

I'd think at WOT it should be more like 27 lbs and reason you have that amount of knock retard but I would have to see a long trace to pin down what the issue is.

Whats the boost ?
I helped a C5 owner who was running 7 PSI and after good tuning it is now pushing close to 575 HP.

Timing is way too low.
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Old 02-06-2002, 01:56 PM
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Default Re: Autotap readings. Good or Bad?

I just found out my Maf Translator was bad. I was on my way to Morgan Motorsports when that happened.(See my other post) They are doing some custom tuning to fix my problem's. Hopefulley it will run lke it should.

Thanks Jason
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Old 02-06-2002, 05:13 PM
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Default Re: Autotap readings. Good or Bad?

Not under all cases,
S2s are important for cold start and PCM in its fuel math uses 25% to what S2s report.

I had a cold misfire issue and just recorded all 4 O2s to find B2S2 going bad, effecting cold idle, which caused misfire due to uneven idle, which CPS took as misfire.

[quote]Originally posted by Jax White TA:
<strong>No need to log B1S2 or B2S2 either. These are your rear O2's.</strong><hr></blockquote>
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Old 02-07-2002, 12:54 AM
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Default Re: Autotap readings. Good or Bad?

Very bad. Your O2's are indicating you are running to lean, preferably you should have 0 KR and your timing is very low - should be at least 25 degrees or more.

Check all the plugs, plug wires, and the plug gaps then autotap again. Also are you running a stock PCM or has it been programmed? I didn't see your mods but your named is "superchargedZ" so I was wondering what your exact combo is. Anyways there is alot more power to be had judging by those readings.

[ February 06, 2002: Message edited by: Godspeed ]</p>
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