[SandyC]

If a builder "opens up" the programming on their EFI system, for example, without at least a warning not to touch or risk messing everything up, then that builder, in my opinion, is obligated to provide the customer with detailed, and I mean detailed, documentation of the system, how it works and a flow chart showing a workflow on how to set it up with specs, numbers, charts and graphs included. This would require a lot of time and work by the builders and I have yet to see anyone do it properly. I don't know why except maybe it's just too much paperwork for a small group of customers that would actually use this info.

It's been a frustrating experience for me in other fields when a manufacturer tells you kind of how to do things without telling you in detail how to do it. I was looking at an owner's manual for a Hewlett-Packard professional grade large format inkjet printer the other day and it was absolutely fantastic. Man, that's how to write a user's manual. I have yet to see a single product in the automobile aftermarket field that even approaches that level of professionalism in documentation (although the automobile OEM's do a good job on their shop manuals for service centers). If a builder is unable to document their system with that level of professionalism then at least a serious warning needs to be issued to the user to keep hands off because basically he's on his own and there's trouble brewing.

I've read time and again how someone had tried to tune their EFI system and had poor results and ended up taking it to an expensive professional for tuning. If the user had just had the proper documentation he wouldn't have to do that. In my opinion if a builder doesn't document their system in detail then they should lock it and provide good customer support in the field instead, if for no other reason than to prevent the customer from digging the hole deeper.