Check out my log " it doesnt look right!"

[joeyzaza]

Here is a log I just did in my 97 auto gsx. stock t25, stock injectors and pump. Is my o2 bad. the car has been backfiring when shifting. I logged a bunch of other stuff, but could only put this much in one post. I used Evo scan to log. Thanks




TPS RPM TIMING O2 VOL INJ DUTY CYCLE

14.90 750.0 8 0.03904 1.60
14.90 750.0 9 0.03904 1.69
16.86 718.8 11 0.01952 3.20
27.45 781.3 14 0.01952 6.20
30.98 1156.3 9 0.03904 9.28
33.33 1625.0 15 0.03904 10.62
37.65 1906.3 16 0.03904 11.95
39.22 2062.5 18 0.03904 12.51
39.61 2093.8 18 0.03904 13.15
39.61 2125.0 17 0.03904 13.15
39.61 2125.0 17 0.03904 13.34
39.61 2156.3 18 0.03904 13.73
39.61 2218.8 17 0.03904 13.92
39.61 2281.3 18 0.03904 14.31
39.61 2343.8 16 0.03904 15.20
40.39 2375.0 16 0.03904 15.91
43.14 2437.5 15 0.03904 17.07
45.49 2531.3 14 0.03904 18.81
48.63 2625.0 14 0.01952 20.07
50.98 2718.8 13 0.01952 22.80
52.16 2843.8 12 0.01952 25.33
53.33 3000.0 12 0.01952 26.40
53.73 3156.3 12 0.01952 29.81
54.12 3312.5 11 0.01952 34.88
54.51 3468.8 11 0.01952 39.87
58.82 3656.3 11 0.01952 47.59
70.98 3843.8 9 0.01952 56.32
77.25 4062.5 8 0.01952 67.50
78.04 4312.5 8 0.01952 80.23
78.43 4593.8 8 0 89.32
78.82 4937.5 10 0 94.60
78.82 5281.3 12 0 97.39
78.43 5625.0 14 0 96.72
74.12 5937.5 15 0 97.50
69.02 6156.3 16 0 97.44
67.06 6437.5 18 0 97.06
63.53 6687.5 19 0 95.92
56.47 6906.3 20 0 94.50
51.76 7093.8 21 0 90.86
51.37 7250.0 22 0 89.68
51.37 6781.3 20 0 89.31
52.16 5812.5 15 0 83.72
51.76 4843.8 10 0 83.72
51.76 5062.5 11 0 85.73
51.37 5125.0 11 0 84.27
51.37 5031.3 11 0 83.72
51.37 4937.5 11 0 81.60
51.37 4718.8 9 0 77.08
51.37 4250.0 7 0 63.65
51.76 3937.5 7 0.01952 62.65
53.33 3968.8 7 0 62.65
53.73 4000.0 7 0 63.15
53.73 4031.3 7 0 64.13
55.69 4093.8 7 0 66.88
62.35 4125.0 7 0 70.05
72.16 4187.5 7 0 73.80
73.33 4218.8 7 0 75.81
74.12 4281.3 8 0 78.77
77.65 4343.8 8 0 80.27
78.43 4437.5 8 0 82.36
65.49 4437.5 8 0 0.00 BACKFIRE AROUND HERE
53.73 3937.5 10 0.03904 68.54 WHEN SHIFTING
19.22 4343.8 22 0 9.31
14.51 3968.8 32 0 6.72
14.51 3937.5 33 0 5.00
14.51 3875.0 33 0 4.10
14.51 3812.5 33 0.07808 0.00

 

[joeyzaza]

I forget, do you have a log of knock, i know evo scan records knock, so please post that up please.

I do not believe you can log knock on a 2g. Even with Evo Scan

Make sure your TPS is reading 10% at idle and 100% at WOT

I put a larger spring on the Throttle cable, because it will not shut all the way. The old spring was going bad. When I'm at Satan tomorrow, I'll probably spend like $50 on a new spring, .

 

[97GSTAUTO]

Yea, evoscan does not log knock. It does knock sensor voltage. But thats useless. I can fart and raise knock sensor voltage.

 

[joeyzaza]

Ya Evo Scan isn't as cool as it looks, but does a great job with data. Its super fast through USB on my computer. When I turn it on it says "link in gauged" I feel like I'm in the Fast and Furious.

 

[bluegs03]

Yea honestly first thing i would do is fix that TPS if possible, if that was meant to be a WOT run in parts you still have 30% more power to gain just from adjusting that cable!

 

[joeyzaza]

Definitely going to get that right tomorrow too!!

 

[97GSTAUTO]

Ya Evo Scan isn't as cool as it looks, but does a great job with data. Its super fast through USB on my computer. When I turn it on it says "link in gauged" I feel like I'm in the Fast and Furious.

"link engauged" Yea. Evoscan looks good. I like it. I really like the graphing. So I dont have to look at all of the values in the spreadsheet at once. I can just select which ones I want to look at and plot them on a graph. But I think that if Im going to keep my dsm that Im going to have to get dsmlink.

 

[joeyzaza]

I agree totally on dsm link!! But I have been reading about running evo ecus and tuning them with Evo Scan.

 

[97GSTAUTO]

Yes. I have been following that thread too. Very very enticing. But I think dsmlink provides a more thorough tuning solution. Also samples rates are an ass of alot higher on the link than it is on evoscan.

 

[joeyzaza]

Update:

I did another boost leak test today. The car loses pressure fast. I heard air escaping by the throttle body, but sprayed everything down and found no bubbles. I then tested again, and had my buddy push down on the gas, and the sound changed. I must have a big boost leak at my throttle body shaft seals.

Could this leak be bad enough to cause fuel cut?

 

[VETTE_50_TH]

It can do a lot of things. Your car is losing metered air that your ECU think it has, so it compensates by adding fuel, and the car isnt fully igniting all the gas, probably leading to pinging, so it sputters and pulls timing. Which would explain those crazy timing logs.

James

 

[joeyzaza]

I ordered a new biss screw, shaft seals and throttle body seals from machv. I'm on vacation so as soon as they are in, I'll be putting them in. I will update after that. Thanks

 

[joeyzaza]

Hey Vette, you work at Best Buy?

 

[joeyzaza]

My log looked all wack because a boost leak at the throttle body shaft seals. Thanks for the help.