Originally Posted by 03sierraslt

I would lower your PE settings. Engine-Fuel Control-Power Enrich I would set Delay RPM to 0. Enable to to 0. I would also set your enrichment rate to 4.0

Judging by your VE table it appears as though its compensating for a Incorrect MAF table. You have a very large jump at 3600rpm, it should not be that durastic of a change.

Your timing table also has some absurd jumps in it..... Pull up your timing table and look at it in the 3D chart view and youll see what I mean.

Originally Posted by 03sierraslt

So what did you find playing with your PE settings? Did you get a chance to work on your VE and timing tables?

Originally Posted by BlackGMC

True, this is kinda a simpliefied version of how I believe the tables work. The uses the values in the VE and MAF table to provide the amount of AIR needed to provide a AFR of 14.63 or 1.00... If the AFR is off that is where STFT and LTFT come into play.... The computer will use the AIR value but it will adjust the amount of fuel it applies with the fuel trims to achieve the commanded AFR, so if your trims are more than +/- 5% your losing power. So this is why these two table need to be tuned for the mods you have, every mod will change the way your engine breathes and exhales.... The VE and MAF table are the base of every AFR calculation the computer makes, so when they are wrong the AFR is wrong and your STFT and LTFT have to compensate... Does that make sense?

Now on to how PE works....

PE calculation with VE table...

Given a certain MAP and RPM value. For example in my tune MAP = 95 and RPM = 3200 that intersection in my VE table is 95.02, so the computer will use 95.02 in the AFR calculation to achieve 14.63.... Next throw in the PE value of 12.5, this is the value that I am commanding according to my PE table at 3200 rpm.... The computer does the following to calculate how much air is needed to acheive that AFR... 12.5 = 1.17 (14.63/12.5=1.17) the computer uses the eq value and multiplies it by the VE value so in our example 95.02*1.17 =111.17 amount of air needed to achieve a AFR 12.5... Does all that make sense.... I may be way off but this is the way I understand the way the tables work together...

Originally Posted by phasemaster1

Well I'm glad I didn't mess with it. I have a 160 thermo installed and temp varies from 180 in the cooler weather and highway to 195-200 in traffic. When the temp is at 180 on the stock cluster I see the 12.3 afr. Yesterday on the way home temp was around 200 degrees on the street and got on it afr was 13.1 and richened up as i sped up to about 12.6. I think the lower 160 thermo screwing me up i want to put a stock one back in and see what happends before i mess something up. you think computer sees cooler engine temp and is adding fuel?