HI


Do you mean another PCM?
Yes, I don't have a spare atm.

The only other thread I've read about surging not going away, the poster changed their cam.

Have you double checked all your PCM grounds?
Not yet but after cleaning/reseating the injectors I'll check all grounds & PCM connections as well.

all the tables were expanded to use MAP. I'm interested in how you interpolated the data for the $EE tables.
The Online Data doesn't mach up with the supplied data[/QUOTE]

I originally emailed FIClinic:
Which kPa value i would use for an LT1 with the 16188051
OBD1 PCM for the Voltage offsets.
The fuel system is the std 3 bar with the referenced FPR. So I'm thinking I
would use 300kPa vaules from the table

Response was: 300kpa values should work fine.


Data supplied: I'll scan data sheet if anyone is interested.
Slope flow matching data: Average flow rate at 43.5psi = 428cc/min. Your set is Flow matched within 1.9%
Injector offset matching data: Average offset at 3bar & 13.5V 962uS. You set is matched within 1.4%



In my notes Fuel pressure at Idle with Vac hose off is 47psi (which is what the engine should see under WOT)

**** So we need to use the 47psi injector kPa value ===
1 psi = 6.89476 kPa
47 psi = 324.05372 kPa

LS table Spacing is spaced 16.0kPa which is approx 2.3206038037 psi

I don't use MS Excell but I do use Libre Office Calc and none that I have are able to Interpolate data...
So I wrote a program to do a linear interpolation (don't ask about slope matching) to generate some nos.

This gives Interpolated results of
Volts Kpa From Next table
0.000000 324.050000
========================
0.400000 291.645000
0.800000 259.240000
1.200000 226.835000
1.600000 194.430000
2.000000 162.025000
2.400000 129.620000
2.800000 97.215000
3.200000 64.810000
3.600000 32.405000
4.000000 0.000000
4.100000 0.000000
4.200000 0.000000
4.300000 0.000000
4.400000 0.000000
4.500000 0.000000
4.600000 0.000000
4.700000 0.000000
4.800000 0.000000
4.900000 0.000000
5.000000 0.000000
5.100000 0.164857
5.200000 0.329714
5.300000 0.494571
5.400000 0.659428
5.500000 0.824285
5.600000 0.989142
5.700000 1.153999
5.800000 1.318856
5.900000 1.483713
6.000000 1.648570
6.100000 1.643023
6.200000 1.637475
6.300000 1.631928
6.400000 1.626380
6.500000 1.620833
6.600000 1.615285
6.700000 1.609738
6.800000 1.604190
6.900000 1.598643
7.000000 1.593095
7.100000 1.584205
7.200000 1.575315
7.300000 1.566424
7.400000 1.557534
7.500000 1.548644
7.600000 1.539754
7.700000 1.530863
7.800000 1.521973
7.900000 1.513083
8.000000 1.504192 2.100000
8.100000 1.492807
8.200000 1.481421
8.300000 1.470035
8.400000 1.458649 1.967172
8.500000 1.447263
8.600000 1.435877
8.700000 1.424491
8.800000 1.413106 1.834345
8.900000 1.401720
9.000000 1.390334
9.100000 1.377277
9.200000 1.364220 1.701517
9.300000 1.351163
9.400000 1.338107
9.500000 1.325050
9.600000 1.311993 1.568690
9.700000 1.298936
9.800000 1.285880
9.900000 1.272823
10.000000 1.259766 1.435862
10.100000 1.245878
10.200000 1.231990
10.300000 1.218102
10.400000 1.204214 1.363448
10.500000 1.190326
10.600000 1.176438
10.700000 1.162550
10.800000 1.148662 1.291034
10.900000 1.134774
11.000000 1.120887
11.100000 1.106987
11.200000 1.093088 1.218621
11.300000 1.079189
11.400000 1.065289
11.500000 1.051390
11.600000 1.037490 1.146207
11.700000 1.023591
11.800000 1.009692
11.900000 0.995792
12.000000 0.981893 1.073793
12.100000 0.968827
12.200000 0.955761
12.300000 0.942695
12.400000 0.929629 1.024345
12.500000 0.916563
12.600000 0.903497
12.700000 0.890431
12.800000 0.877365 0.974897
12.900000 0.864299
13.000000 0.851232
13.100000 0.839822
13.200000 0.828411 0.925448
13.300000 0.817001
13.400000 0.805590
13.500000 0.794180
13.600000 0.782769 0.876000
13.700000 0.771359
13.800000 0.759948
13.900000 0.748538
14.000000 0.737127 0.826552
14.100000 0.728220
14.200000 0.719312
14.300000 0.710404
14.400000 0.701496 0.793103
14.500000 0.692588
14.600000 0.683680
14.700000 0.674773
14.800000 0.665865 0.759655
14.900000 0.656957
15.000000 0.648049 0.742931
15.100000 0.642464
15.200000 0.636878
15.300000 0.631293
15.400000 0.625708
15.500000 0.620123
15.600000 0.614537
15.700000 0.608952
15.800000 0.603367
15.900000 0.597781
16.000000 0.592196 0.659310
16.100000 0.590775
16.200000 0.589355
16.300000 0.587934
16.400000 0.586513
16.500000 0.585093
16.600000 0.583672
16.700000 0.582252
16.800000 0.580831
16.900000 0.579410
17.000000 0.577990
17.100000 0.577990
17.200000 0.577990
17.300000 0.577990
17.400000 0.577990
17.500000 0.577990
17.600000 0.577990
17.700000 0.577990
17.800000 0.577990
17.900000 0.577990
18.000000 0.577990
18.100000 0.577990
18.200000 0.577990
18.300000 0.577990
18.400000 0.577990
18.500000 0.577990
18.600000 0.577990
18.700000 0.577990
18.800000 0.577990
18.900000 0.577990
19.000000 0.577990
19.100000 0.577990
19.200000 0.577990
19.300000 0.577990
19.400000 0.577990
19.500000 0.577990
19.600000 0.577990
19.700000 0.577990
19.800000 0.577990
19.900000 0.577990
20.000000 0.577990


Figures supplied & Interpolated were
Volts PSI
0.000000 47.000000
=================================
0.400000 44.755000
0.800000 42.510000
1.200000 40.265000
1.600000 38.020000
2.000000 35.775000
2.400000 33.530000
2.800000 31.285000
3.200000 29.040000
3.600000 26.795000
4.000000 24.550000
4.400000 22.305000
4.800000 20.060000
5.200000 17.815000
5.600000 15.570000
6.000000 13.325000
6.400000 11.080000
6.800000 8.835000
7.200000 6.590000
7.600000 4.345000
8.000000 2.100000
8.100000 2.066793
8.200000 2.033586
8.300000 2.000379
8.400000 1.967172
8.500000 1.933966
8.600000 1.900759
8.700000 1.867552
8.800000 1.834345
8.900000 1.801138
9.000000 1.767931
9.100000 1.734724
9.200000 1.701517
9.300000 1.668310
9.400000 1.635103
9.500000 1.601897
9.600000 1.568690
9.700000 1.535483
9.800000 1.502276
9.900000 1.469069
10.000000 1.435862
10.100000 1.417759
10.200000 1.399655
10.300000 1.381552
10.400000 1.363448
10.500000 1.345345
10.600000 1.327241
10.700000 1.309138
10.800000 1.291034
10.900000 1.272931
11.000000 1.254828
11.100000 1.236724
11.200000 1.218621
11.300000 1.200517
11.400000 1.182414
11.500000 1.164310
11.600000 1.146207
11.700000 1.128103
11.800000 1.110000
11.900000 1.091897
12.000000 1.073793
12.100000 1.061431
12.200000 1.049069
12.300000 1.036707
12.400000 1.024345
12.500000 1.011983
12.600000 0.999621
12.700000 0.987259
12.800000 0.974897
12.900000 0.962534
13.000000 0.950172
13.100000 0.937810
13.200000 0.925448
13.300000 0.913086
13.400000 0.900724
13.500000 0.888362
13.600000 0.876000
13.700000 0.863638
13.800000 0.851276
13.900000 0.838914
14.000000 0.826552
14.100000 0.818190
14.200000 0.809828
14.300000 0.801466
14.400000 0.793103
14.500000 0.784741
14.600000 0.776379
14.700000 0.768017
14.800000 0.759655
14.900000 0.751293
15.000000 0.742931
15.100000 0.734569
15.200000 0.726207
15.300000 0.717845
15.400000 0.709483
15.500000 0.701121
15.600000 0.692759
15.700000 0.684397
15.800000 0.676034
15.900000 0.667672
16.000000 0.659310

Accurate choice of two there !

FIC Inj Short Pulse adder
Mix of two PCM tables

Inj Pulse adder
0.0 0.250 0.0 0.250
0.06 0.236
0.1 0.227
0.12 0.222
0.18 0.209
0.24 0.195
0.30 0.181 0.3 0.182
0.36 0.167
0.4 0.159
0.43 0.153
0.49 0.139
0.5 0.136
0.55 0.126
0.6 0.114
0.61 0.112
0.67 0.098
0.73 0.084
0.79 0.029
0.8 0.068
0.85 0.057
0.9 0.045
0.91 0.043
0.97 0.029
1.0 0.023
1.03 0.015
1.09 0.001
1.1 0.0
1.16 0.0

Interpolated data (LT1 table min division is 15.3uS)
====================
488=139.2 == 137.2 0x09
549=126.2 == 122.1 0x08
610=112.0 == 106.8 0x07
671= 97.5 == 91.6 0x06
732= 81.2 == 76.3 0x05 *
793= 69.3 == 76.3 0x05 *
854= 56.0 == 61.0 0x04
915= 41.6 == 45.8 0x03
976= 27.6 == 30.5 0x02
1037= 13.1 == 15.3 0x01
1098= 1.0 == 0.0 0x00






The 1st shows a really BIG difference in the injector PW on cold startup. about 2mS & 6mS initially. I noticed you are using some beta version 4.8 of eehack.

Where did you get it. Last stable release was 4.7 , and I used 4.7 as a base for all mods I have done.
It could be that this beta version has some bugs in the datastream.

I suggest you to switch to 4.7 or the one I modified and try to duplicate that condition. It is weird because narrowband 02s are the same accross the banks and did not get lean, on the right side with that much fuel you should get a stall at cold start up.
The 4.8 I think was from Steveo's site. This is on the PC in my office. The car is either running 4.7 or your 13_10_2018_v2 version.


I suspect a bad injector on the right side also, you got intermitten lean conditions on the right side which resembles me the same conditions I got with an injector set that went in the trash bin.

That random errors also suggest a bad wiring or bad pcm. You should check for melted wires around headers.
If you look again, in the 2nd jpg, both injectors are around 5 or 6mS.
This is on a bog stock Z28 tune.
The fault seemed to be on the LHS

A new PCM is on its way.

What I find strange is that
a: the O2's don't suggest anything odd but then they are still cold.
b: How or WHY is the Injector pulse calculated differently for each bank ?

I replugged/sprayed cleaner on the injector connectors between runs.

On another note, Why don`t you get a 85mm truck MAF and give it a try. It is not that expensive and will support a lot more airflow. Delphi units goes for 70-80$.
I never got that far with the tuning :-)
I started tuning SD and this lean surge has never fully gone away unless I dump fuel into it.


Mitch