I just can't get my head around it

I can't work out even how to write down what I want to ask

 if you have marks to the left side of the red line on the anyliser what do you do to the EGR table to make the correction?

Is the idea to get all the marks that are on the left to the right of the red line?

Adjusting the EGR tables lower does that reduce the marks to the left of the red line?

a step by step with pics would be good to get my head around this

EGR adjustment is used to smooth the VE tables out at lower RPM and lower load areas. This will improve throttle response and driveability in these lower areas. Many have also stated that there mileage improves as well. I am not sure what marks you are referring too but it is covered in chapter 4 of the supplied tuning guide.

It does take a bit of brain power to get the head around the EGR process. What is a bit of a brain tease is that not all the RPM points on the VE tables match the EGR ones. Hard to explain the process off the cuff, but here goes, & I hope it makes sense.
Once you've generated the vtune map, click on settings, then click on High Light low MAP. This will show some of the VE’s in bold numerals. I guess you could say that the bold numbers are to the left of the red line on the EGR analyser.
Going along one column at a time, find the percentage difference between the last bold VE number in that column & the next VE number (non-bold). After you've got the percentage amounts for all the columns, add each percentage amount to the appropriate RPM point in the EGR table.
With the RPM points not all matching in the VE & the EGR table, it becomes a bit of a juggling act to average out the figures for some of the RPM points in the EGR table.
The idea, I think, is to get the dots onto or to the right of the red line in the analyser. This also smooths out the VE tables so that you see smooth waves in the VE graph, rather than sharp peaks, & it really does smooth out the engine, especially @ cruising speed.
I have an Excel spread sheet I down loaded off HTT that I use it to help with adjusting the EGR tables (another thing to get your head around). Tried to attach it here, but it looks like I will have to PM you a copy if you would like one. - Rob

Rob you now have made a bit of sense an how I start off so thanks

you have my email so yeh email that spread sheet

cheers

So if the Bold VE number is high than the next Column VE number you would not worry about it or would you reduce it by the % difference

As when the bold VE number is lower than the next column you would raise by the % difference

and I mean raise or lower the % difference in the EGR table

As Hilly said, it takes a bit of trial & error to get a good result, & a lot of persistence with some engine/exhaust combos also I might add. My old 96cid engine for example, with Andrews 54 & KromeWerks slip-ons on stock 2 into 2 pipes were really frustrating to get right. The end result was a smooth running donk. With V&H 2 into 1 on the same engine, the EGR tables hardly needed touching- Rob

i gave up trying to figure out what was happening with the line.

Pretty good method by Mayor on HTT for adjusting VE's for EGR

Adjust as required to get the last highlighted VE within 10% of the next VE in the rpm row

VE's are usually increasing across the row in highlighted area , so within 10% on the low side  of the next VE to maintain the trend

so you're actually smoothing the VE's while adjusting for EGR

Just so you understand what you are trying to do is keep the VE values calculated by the ECM all close together. What this does is get the prediction from the ECM be as closed as possible to the correct number regardless of throttle position or MAP to the same value. Think about it, when your VE's are all chopped up and if one time it get the values from the bottom of the valley and the next from the top of the hill the injectors are tracking back and forth and never settling down for smooth operation. This cost you power and driveability.