87GMC

99 GMC 5.3L All stock except for k&N filter. Where do I start to get them down to 0%


Cell# MAP/RPM boundaries Bank-1 Bank-2
0 MAP 0.00..33.0 kPa/RPM 0..900 0.00% 1.56%
1 MAP 0.00..33.0 kPa/RPM 900..1400 0.00% 1.56%
2 MAP 0.00..33.0 kPa/RPM 1400..2200 11.72% 12.30%
3 MAP 0.00..33.0 kPa/RPM 2200+ 11.72% 12.30%
4 MAP 33.0..55.0 kPa/RPM 0..900 1.95% 4.49%
5 MAP 33.0..55.0 kPa/RPM 900..1400 4.88% 6.45%
6 MAP 33.0..55.0 kPa/RPM 1400..2200 9.77% 9.37%
7 MAP 33.0..55.0 kPa/RPM 2200+ 11.72% 12.30%
8 MAP 55.0..77.0 kPa/RPM 0..900 11.72% 12.30%
9 MAP 55.0..77.0 kPa/RPM 900..1400 7.81% 8.40%
10 MAP 55.0..77.0 kPa/RPM 1400..2200 8.79% 9.37%
11 MAP 55.0..77.0 kPa/RPM 2200+ 11.72% 12.30%
12 MAP 77.0+ kPa/RPM 0..900 11.72% 12.30%
13 MAP 77.0+ kPa/RPM 900..1400 11.72% 12.30%
14 MAP 77.0+ kPa/RPM 1400..2200 11.72% 12.30%
15 MAP 77.0+ kPa/RPM 2200+ 11.72% 12.30%
16 P/N: A/C On 11.72% 12.30%
17 P/N: A/C Off 11.72% 12.30%
18 In gear: A/C On 11.72% 12.30%
19 In gear: A/C Off 4.88% 5.47%
20 Cold idle 5.86% 6.45%
21 Deceleration 10.74% 11.72%
22 WOT 10.74% 14.65%

87GMC

ttt anyone?

Drake

iTrader: (1)

In general, you have three options: Edit the IFR table to make the computer think that you're using smaller injectors, edit the VE table, or edit the MAF table.

I'm new to tuning, so please keep that in mind, but my opinion is that you should probably tune with the VE and MAF table rather than the IFR table. I've been doing that, and having good luck so far.

Bill Bowling

iTrader: (6)

At first I started to used the MAF table and had problems. Now I use the IFR table with no problems.

Bill