Ok, I haven't even picked up any programming equipment yet, but I have been reading up on what does what and what information to look for. Unfortunatly, I'm still really confused .

I ran my car using WinALDL and even though I only understand a little bit of it, its a fun program to use.

What I want to know is, will someone look at my collected data and tell me where I need to adjust my chip for optimum performance? The car runs really rich at idle and gets lean at WOT. Also, how would I adjust it after buying the equipment (what tables, which way to adjust the integers, etc.)

Anyone who could look at and explain the information to me like a sixth grader would be the biggest pimp I know.

Any help is appreciated,
Mike

 

If you have any questions about the WinALDL I can probably answer them.

WinALDL (and other scanners) is useful when you are tuning in closed loop. In that mode the ECM uses the O2 sensor to fine tune the air/fuel mix. By looking at the compensation the ECM uses ( INT & BLM ) to get the mixture right you can see if the main fuel table is rich or lean.

WOT tuning is a bit more complicated. To get that right you can't use the scanner alone. You can see the O2 value if it is running rich, but not how rich. The update interval is too slow also, a lot can happen in a second. To get the WOT tuning right you should use a Wide Band O2 sensor. That type of sensor is used at dynos to plot the Air-Fuel / RPM graph.

Other people on this board has done a lot of tuning and chip burning, so I will let them explain that part.

 

so it sounds like it would be possible then to simply adjust the table (tables?) on the basis of what the BLM and INT is? I think that I remeber reading something about there being a formula to adjust one value into the corrected table, I dont quite recall right now.

Furthermore, what happens if I change one table, the main fuel table for example, without changing any information in any of the other ones? Will there be a conflict and then a trouble code?

I'm pretty much just curious as to how to interpret the data into something that would be useful if I burn a chip or have someone do it for me...

Maybe it would even be easier if I were to see actual screenshots.

Man, this computer stuff just keeps throwing me off, but its got to be used. Its like learning to walk again...

Thanks for any additional help,
Mike

 

It is a bit more to it than that , but yes you modify the tables based in BLM and INT. The INT reacts a lot faster so you usually lock the BLM to 128 ( ask the tuners how to do that ) and use the INT value to speed up the tuning. Modify the table a bit and try it again. It is time consuming.

You can change one cell in the table without affecting anything else, that is the benefit with EFI. With a carb you change a jetting and affect a lot more. Same with the spark. You can set up spark curves that is not possible with weights and vaccum.

When you made all the changes you have to calculate the checksum for the modified chip. If the checksum does not match the data the ECM thinks that the chip is bad and goes into limp home mode ( runs very bad, but good enough to get you home ). Many prom edit softwares automatically calulate the checksum for you.