[Dr Jkel]

February 6, 2012 Monday

Wellllllllllllll......................the saga continues....Thinking about changing the name of Mr. Hyde to " PITA ", LOL

We have been waiting on some computer supplies for datalogging and the arrives this past Friday...We spent all weekend trying to make the things work.

I am finding out that this fuel injection system is alot like Savini....No Customer service. I spent a ton of money on this sytem from Street and Performance and for them not to be able to give me a decent tune or one that will make the truck idle is pretty sad.

This system is outdated at best. They took 1990 technology and put it in a pretty package. There is not alot of information out there about TPI tuning.

While tuning is tuning and the same rules apply you have to know the tools to use on certain systems....Each type of system has it's own set of tool and rules so unless you do alot of TPI tuning you have no basis to start.

Matt is good at tuning and tunes Honda's and LS Motor all the time but this sytem is proving to be a PITA.

I finally found a Chevy truck forum and just started asking questions. Luckily I found a guy who has wrote many of the files for the tuning program. He was able to tell us why we were getting errors and having problems trying to connect the laptop to the truck computer. He sent us some uncorrupted files. Matt spent awhile on the phone with him, ironically his name is Mark, LOL

Once we get the computer connected to the laptop we will be able to start datalogging and see actually what this thing is doing electronically. After Matt get a datalog file he will then be able to see why it is dying .

Basically it has a open/closed loop system and when it goes from one to the other it dies. The system is showing lean when it goes to closed loop and when that happens it dies. It shows no vacuum at the MAP and the computer thinks it is in decel mode and kills the fuel.

Matt says once he sees the readings from the datalogger he will then be able to change the parameters to make it idle, run and perform. Right now we are using teh 24 lb injectors just to be able to get it idling and running but will then change the injectors to 42 lb inj so that I don't starve it of fuel at higher RPM's......

I am hoping that by Friday we will have the tune issues resolved at least enough to drive around the block without dying, surging or bucking.............