RPM and injector duty cycle not smooth

[ericmetcalf11]

Here is my log on a 3rd gear pull. Car is a 90 GSX with basically no mods; K&N filter and mbc set to 12psi.

Why do my RPMs and injector duty cycle keeps dropping off even though I'm WOT?!

TIMA O2-R TPS MAFS ERPM KNCK INJP
32 0.76 28.24 359 3188 0 7.42
25 0.84 100 598 3313 0 9.73
23 0.88 100 704 3281 0 11.26
21 0.88 100 793 3375 0 13.06
20 0.9 100 893 3469 0 14.08
18 0.9 100 950 3531 0 14.85
18 0.9 100 962 3719 0 14.59
19 0.9 100 1006 3844 5 14.59
18 0.9 100 1050 3781 8 14.85
16 0.9 100 1107 4000 8 15.36
16 0.9 100 1107 4094 8 15.36
16 0.9 100 1145 4188 7 15.36
16 0.9 100 1170 4219 7 15.62
17 0.9 100 1208 4344 7 15.62
17 0.9 100 1227 4375 6 16.13
17 0.9 100 1289 4594 6 16.13
17 0.9 100 1302 4625 8 16.13
17 0.9 100 1283 4688 7 15.87
17 0.9 100 1302 4875 7 15.87
16 0.9 100 1340 4781 6 16.13
17 0.9 100 1378 5000 6 16.13
17 0.9 100 1384 4938 6 15.87
18 0.9 100 1434 5188 6 16.13
17 0.9 100 1403 5094 5 16.13
18 0.9 100 1478 5250 5 16.13
18 0.9 100 1428 5438 5 16.38
19 0.9 100 1466 5375 5 16.38
19 0.9 100 1447 5406 5 16.13
20 0.88 100 1484 5375 5 16.13
20 0.88 100 1510 5625 4 16.13
20 0.88 100 1497 5563 4 16.13
20 0.88 100 1497 5813 4 15.87
21 0.88 100 1560 5688 4 15.62
20 0.88 100 1573 5719 8 15.87
20 0.88 100 1579 5719 8 15.87
21 0.88 100 1585 5938 8 15.87
21 0.88 100 1541 6094 20 16.13
16 0.88 100 1554 6000 19 16.38
16 0.88 100 1604 6250 19 16.38
15 0.88 100 1604 6250 19 16.38
15 0.88 100 1604 6188 19 16.38
16 0.88 100 1604 6250 18 16.13
16 0.88 100 1604 6375 18 15.87
16 0.88 100 1604 6313 18 15.87
15 0.88 100 1604 6406 17 15.87
16 0.88 100 1604 6344 17 15.87
15 0.88 33.33 1390 6469 17 2.56
38 0.8 10.2 201 5781 0 1.79

Thanks,
Eric