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Chicken
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PostSubject: Scan numbers...   Mon Sep 01, 2008 6:56 pm

After I did all my mods, replaced filters, plugs, wires and fluid etc., I just did my first real scan on the aeroforce gauge using the parameters listed below.

It was a run from 0 - approx. 70 mph. Had traction problems from launch and the outside temperature was 79*

Can any of you guys make any sense of these numbers and give me a diagnosis?


BOOST 4.6 5.4 6.8 5.9 5.6 5.9 6.2 6.1 6.7 6.5 6.4 6.7 6.4 7.2 7.2 7.1 7.2 6.8 8.3 7.7 7.5 8 7.7 8.4 8.4 8.3 -19.6 -22.6 -22.9 -22 -22 -21.4 -21.4 -19.1
MAFF 10.29 12.11 22.14 22.08 21.29 13.59 13.49 13.59 15.47 15.84 16.08 17.83 18.1 17.99 19.2 19.65 20.02 21.94 21.94 21.94 23.56 23.82 24.36 25.82 25.52 26.18 1.12 1.14 1.07 0.82 0.81 0.75 0.74 0.69
KNOCK RETARD 0.7 0.7 0.6 0.6 0 0 2 1.9 1.8 0.6 0.5 0.4 0 3.2 3 2.9 1.8 1.7 1.6 2.4 2.3 2.2 1 0.9 0.8 0 0 0 0
IGNITION ADVANCE -18 -17 -16.5 -26.5 -32 -26 -16 -16 -16.5 -16 -16.5 -16.5 -16 -12.5 -12.5 -12.5 -13 -13 -12.5 -11.5 -11.5 -12 -13 -13 -13 -30.5 -30 -29 -27
LTFT 7 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 -3.1 -4.6 -6.2 -11.7 -11.7 -11.7 -11.7 -11.7
O2 920 915 930 170 890 910 915 915 910 915 910 900 910 905 890 910 905 895 905 905 900 865 845 835 820 830 795 720 725
IAT 78 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80
RPM 4398 4664 4908 3055 3091 3120 3352 3369 3395 3723 3744 3777 4032 4070 4398 4427 4458 4748 4783 4818 5140 4872 4297 4020 2051 2004 1965 1554 1518 1497 1175 1131 1113
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PostSubject: Re: Scan numbers...   Mon Sep 01, 2008 10:36 pm

It's hard for me to really read these numbers too accurately. It may be easier in a table but it definitely looks like you're lean. It looks to me that where your major KR spike happens (3.2) your O2's are at 890 and should be closer to 915-920. LT FT also show the lean condition they should be at 0. That's about the way my scans looked before I tuned and after I did some mods.
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 8:59 am

It's also hard for me to make any suggestions based on that - can you scan using MAF Hz and MAP KPA instead of 'boost'?

I'd consider adding a little fuel to the MAF table where the O2s are in the high 800s, agreeing with Bob there. Also scan for IPWs so we can be sure you aren't maxing out your injectors.
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 9:28 am

In progress:

Code:
BOOST   4.6       5.4       6.8       5.9       5.6       5.9       6.2       6.1        6.7       6.5       6.4       6.7      6.4
MAFF   10.29   12.11   22.14   22.08   21.29   13.59   13.49   13.59   15.47   15.84   16.08   17.83   18.1   17.99   
KR         0.7      0.7      0.6       0.6       0.0       0.0       2.0       1.9      1.8       0.6       0.5       0.4       0.0       3.2       3.0       2.9       1.8      1.7       1.6       2.4       2.3       2.2       1.0       0.9       0.8       0.0       0.0       0.0       0.0                     
IGNITION ADVANCE   -18   -17   -16.5   -26.5   -32   -26   -16   -16   -16.5   -16   -16.5   -16.5   -16   -12.5   -12.5   -12.5   -13   -13   -12.5   -11.5   -11.5   -12   -13   -13   -13   -30.5   -30   -29   -27                     
LTFT   7   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   7.8   -3.1   -4.6   -6.2   -11.7   -11.7   -11.7   -11.7   -11.7                     
O2   920   915   930   170   890   910   915   915   910   915   910   900   910   905   890   910   905   895   905   905   900   865   845   835   820   830   795   720   725                     
IAT   78   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80   80         
RPM   4398   4664   4908   3055   3091   3120   3352   3369   3395   3723   3744   3777   4032   4070   4398   4427   4458   4748   4783   4818   5140   4872   4297   4020   2051   2004   1965   1554   1518   1497   1175   1131   1113


Code:
BOOST 7.2    7.2       7.1       7.2    6.8     8.3  7.7  7.5  8  7.7     8.4     8.4     8.3  -19.6     -22.6  -22.9  -22     -22     -21.4  -21.4  -19.1
19.2   19.65   20.02   21.94   21.94   21.94   23.56   23.82   24.36   25.82   25.52   26.18   1.12   1.14   1.07   0.82   0.81   0.75   0.74   0.69   

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 9:29 am

I don't see current mods that would max his stock injectors?
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 9:45 am

You guys want me to rescan and put it in a table?

What parameters should I choose to scan? I can have up to 8 at a time on the aerforce....
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 11:15 am

1998 Riv wrote:
I don't see current mods that would max his stock injectors?

I don't either but it's not unheard of...
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 11:23 am

deekster_caddy wrote:
1998 Riv wrote:
I don't see current mods that would max his stock injectors?

I don't either but it's not unheard of...

MAYBE he is running a mix of E85 which is maxxing his injectors out? dunno
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 11:43 am

98riviera98 wrote:
deekster_caddy wrote:
1998 Riv wrote:
I don't see current mods that would max his stock injectors?

I don't either but it's not unheard of...

MAYBE he is running a mix of E85 which is maxxing his injectors out? dunno

He's got too much KR for that! lol
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 1:09 pm

hahaha! no....running 93 octane....


I just changed the fuel filter before this scan. One thing I noticed after the change was an increase of my RPM at idle.....normally I would see numbers between 695 - 750, after the filter change my RPM's shot up to 950+....could this effect my scan? Maybe the PCM was relearning??

This morning the idle was back to normal....
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 1:20 pm

That's odd.
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 1:58 pm

I thought so too....

the only thing I can think of is that the old Fuel Filter was the original (and by the looks of it, it might have been) with 121000 miles on it or so...

maybe it was so filthy it was limiting the normal flow and the PCM adjusted to it? Then when I put on the new filter the flow was restored and the PCM had to take the time to relearn?
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 2:53 pm

I suppose if it was REALLY plugged up.
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 4:12 pm

Chicken, that's absolutely possible re the fuel filter, since it could have been affecting fuel pressure etc... Also you might have dirty injectors. I was surprised how much smoother my engine ran when I put in new injectors.

Want to have my stockers cleaned/flowed? Costs about $80 and you can have the old injectors. See if it makes any difference. Only stipulation is you then have to offer your stock injectors for the same price to someone else who will carry it on lol
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 4:23 pm

I agree..try a new scan after the pcm has adjusted.

If you don't want the injectors Chicken, Id like em and will continue the same deal to whoever wants mine.....or I can wait for yours if you do.

Id rather not have the downtime of waiting for mine to be cleaned and re installed.
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 4:25 pm

Thanks Deek, but before I do fuel, my next mods are headers, new exhaust and a programmer....so I'm gonna have to pass....

...I think I'll add some seafoam to the fuel though....
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 6:17 pm

Something weird is happening to my Riv.....the RPM's have settled back to 725 - 750

...now on my way home (I usually take the same route every day and scan for knock) there was no knock on the hills! Usually, when climbing these hills my TCC would lock and I would see 2 - 3* of knock...

no knock...none...and it was 86* outside. My Riv has never felt or sounded better since I owned it...

...All this because of a fuel filter change?
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PostSubject: Re: Scan numbers...   Tue Sep 02, 2008 7:53 pm

Could be, esp if it was 10 years old!!
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